The molarity of the solution that is prepared by dissolving 14.2 g of NaNO₃ in enough water to make 350 ml of solution is 0.477 M.
The mass of the NaNO₃ = 14.2 g
The molar mass of the NaNO₃ = 85 g/mol
The moles of the NaNO₃ = mass / molar mass
The moles of the NaNO₃ = 14.2 / 85
The moles of the NaNO₃ = 0.167 mol
The molarity expression is as:
The molarity = moles / volume
The molarity = 0.167 / 0.350
The molarity = 0.477 M
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The reaction 2no(g) cl2(g) was performed and the following data obtained under conditions of constant [cl2] ? Is the following mechanism consistent with the data? Explain.NO(g) + Cl2(g) -> NOCl2(g)NOCl2(g) + NO(g) -> 2 NOCl(g)
Yes, the following mechanism consistent with the data. As based on the graph , we can conclude that the reaction order is second order reaction with respect to NO.
The chemical reaction is :
2NO + Cl₂ ----> 2NOCl
The mechanism :
NO + Cl₂ ⇄ NOCl₂ (fast)
NOCl + NO ----> NOCl (slow)
The Rate = k [NOCl₂] [NO]
k [NO] [ Cl₂ ] = k' [NOCl₂ ]
[NOCl₂ ] = K/K' [NO] [ Cl₂ ]
The rate = k K/K' [NO] [ Cl₂ ] [NO]
This confirms that the reaction order is second order with respect to the [NO]. But not the Cl₂.
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rank the relative nucleophilicity of halide ions in dimethyl sulfoxide solution.
In dimethyl sulfoxide (DMSO) solution, the relative nucleophilicity of halide ions can be ranked as follows:
Iodide (I-)
Bromide (Br-)
Chloride (Cl-)
Fluoride (F-)
This ranking is based on the fact that, in general, nucleophilicity increases as the basicity of the species increases. In DMSO, iodide is the most basic halide ion and has the highest nucleophilicity, followed by bromide, chloride, and fluoride in that order. Fluoride is the least nucleophilic due to its small size and high electronegativity, which make it less likely to participate in nucleophilic reactions. Nucleophilicity is a measure of the tendency of a nucleophile (an electron-rich species) to participate in a chemical reaction. It is a measure of the reactivity of a nucleophile towards an electrophile (an electron-poor species). A highly nucleophilic species has a high affinity for electrons and is therefore more likely to react with an electrophile.
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Choose the statement that does NOT pertain to amino acids.
a. The groups composing an amino acid are located around a central alpha-carbon.
b. All amino acids must contain a nitrogen-based molecule and a carboxylic acid.
c. The R-side group will determine the overall chemical properties of an individual amino acid.
d. Amino acids always contain a sulfur atom in their R-side group.
A hydrogen atom, R group, and a carbon atom are all connected by bonds. The amino acid side chain refers to this R group, which differs from one amino acid to another. Among the twenty biologically significant amino acids, five have unique side chains (R). Thus, option D is correct.
What are the main structural components of amino acids?Each amino acid contains a carbon atom at its core, known as the two to which four groups are attached: a hydrogen atom, a carboxylic acid group, an amine group, and an R-group, also known as a variable group or side chain.
The alpha carbon in every amino acid is joined to a hydrogen atom, a carboxyl group, and an amino group. These protein monomers differences from one another are governed by the R group, which alternates between amino acids.
Therefore, Amino acids always contain a sulphur atom in their R-side group.
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of the following, which is the strongest base
The strongest base among the ones listed is NaOH.The conjugate acid NH3 is the least powerful in the group.
which is the H2N-conjugate acid.. H2N- will therefore be the most powerful basis. The existence of a lone pair of electrons on the nitrogen atom, which are available for the bond formation with Lewis acid, is what gives amine its basic nature. due to the +I action of the CH 3 NH 2 group.
Strong Bases List (8):
LiOH (lithium hydroxide) (lithium hydroxide)
NaOH (sodium hydroxide) (sodium hydroxide)
KOH (potassium hydroxide) (potassium hydroxide)
Ca(OH)2 (calcium hydroxide) (calcium hydroxide)
RbOH (rubidium hydroxide) (rubidium hydroxide)
Sr(OH)2 (strontium hydroxide) (strontium hydroxide)
CsOH (cesium hydroxide) (cesium hydroxide)
Ba(OH)2 (barium hydroxide) (barium hydroxide)
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When Alyssa did Part A of the experiment, she observed the solutionoutside the tubing turn black. What might have happened?
The solution outside the tubing might have reacted with the air, causing oxidation and turning black.
When Alyssa performed Part A of the experiment, she observed that the solution outside the tubing turned black. This could be due to a process known as oxidation.
Oxidation is a chemical reaction that occurs when a substance reacts with oxygen in the air. The reaction causes the substance to lose electrons, which can cause a change in color, among other things.
In this case, the solution outside the tubing may have reacted with oxygen in the air, causing it to turn black. This reaction could have been facilitated by heat, light, or other factors that can increase the rate of oxidation. Additionally, the composition of the solution and the presence of any catalysts could have also contributed to the reaction.
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which of these is the correct equation for the dissociation of water?
The dissociation of water is H2O + H2O <==> H3O+ + OH–
Dissociation of water:
The water molecule dissociate into the hydroxyl ion and hydrogen ion. The hydrogen ion immediately protonate the other water molecule and form the hydronium ion.
Chemical equation:
H2O + H2O <==> H3O+ + OH–
The equilibrium constant of self ionization of water is given below:
Kw= [H3O+][OH-]
[H3O+] is the concentration of hydronium ion while [OH-] is the concentration of hydroxyl ion.
Kw is called ionic product of water. The value of Kw is 1.0 × 10∧-14 at 25 °C.
The pure water consist of equal concentration of hydroxyl and hydrogen ions. In order to determine the molarity of both ions square root of ionic product (Kw) is taken.
[OH-]=[H+]= 1.0 × 10∧-7 M
In case of acidic solution concentration f hydrogen ions are greater than hydroxide ions. For example,
HCl when dissociate into water gives H+ and Cl-. The H+ ions increases in solution. The equilibrium is this given by water.
H2O ⇆ H+ + OH-
Reaction is forced to wards left. As a result concentration of hydroxide ions decreases.
Hence above given is a correct answer.
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Select the reasons that the molecule formed by 2 hydrogen atoms (H2) is stable. (choose more than 1)
It is held together by a covalent bond
The octet rule is not satisfied
It has no net charge
It is held together by an ionic bond
It has no unpaired electrons
The molecule formed by 2 hydrogen atoms (H2) is stable because: It is held together by a covalent bond, It has no unpaired electrons, It has no net charge.
It is held together by a covalent bond, which is a type of chemical bond formed by the sharing of electrons between atoms.
It has no unpaired electrons, meaning that each hydrogen atom has a full complement of electrons, resulting in a more stable molecule.
It has no net charge, meaning that the positive and negative charges within the molecule are balanced, resulting in a neutral overall charge.
Hydrogen gas (H2) is a simple molecule composed of two hydrogen atoms bonded together by a covalent bond. A covalent bond is a chemical bond that forms when two atoms share electrons in order to fill their valence shells and become more stable. In the case of H2, each hydrogen atom contributes one electron to the bond, and the electrons are shared between the two atoms.
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4. Matter can be defined as anything that A. has weight. B. has mass and volume. C. is uniform throughout. D. exhibits both chemical and physical properties.
This property of water helps make it the universal solvent: _____.
Responses
A solvencysolvency
B polarity
Answer: B: Polarity
Explanation:
Bromine is a red liquid at 25°C. Its density is 3.12 g/cm3. What is the volume of 28.1 g
of liquid bromine?
A) 87.7 cm3 B) 0.111 cm3 . C) 9.01 cm
D) 28.1 cm3
E) None of the above
Option C) 9.01 cm is the correct answer
What is volume ?
Volume is a measure of the amount of space occupied by an object or a substance. It is a scalar quantity and is expressed in units such as cubic meters, cubic centimeters, liters, or gallons. Volume is an important physical quantity that is used to describe the size of objects and the amount of a substance contained within a container.
In mathematics, volume is often used to describe the amount of space enclosed by a three-dimensional object, such as a cube, sphere, or cylinder. The formula for the volume of a three-dimensional object depends on its shape, but common formulas include the volume of a cube (V = s^3), the volume of a sphere (V = 4/3 π r^3), and the volume of a cylinder (V = π r^2 h).
Density = mass / volume
Density = 3.12 g/ cm3
mass = 28.1 grams
Volume = mass / density
Volume = 28.1 grams / 3.12 grams / cm3
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If 40. 0 g of hci react with an excess of magnesium metal, what is the theoretical yield of hydrogen?.
If 40. 0 g of HCl reacts with an excess of magnesium metal, the theoretical yield of hydrogen is 2.218 g .
Hydrochloric acid (HCl) is a strong, highly corrosive acid that is commonly used in a variety of industrial and laboratory applications. It is a clear, colorless solution that has a pungent, irritating odor. HCl is highly soluble in water and forms an aqueous solution that has a pH of about 1.
The reaction between hydrochloric acid (HCl) and magnesium metal can be represented by the following equation:
HCl(aq) + Mg(s) -> MgCl2(aq) + H2(g)
The theoretical yield of hydrogen can be calculated by using the stoichiometry of the reaction. If 40.0 g of HCl reacts with an excess of magnesium metal, the number of moles of HCl can be calculated as:
n = mass / molar mass = 40.0 g / 36.5 g/mol = 1.097 mol
The stoichiometry of the reaction tells us that one mole of HCl will produce one mole of hydrogen gas. Therefore, the theoretical yield of hydrogen would be:
n = 1.097 mol * 1 mol/mol = 1.097 mol
The mass of 1.097 moles of hydrogen gas can be calculated as:
mass = n * molar mass = 1.097 mol * 2.016 g/mol = 2.218 g
Therefore, If 40. 0 g of HCl reacts with an excess of magnesium metal, the theoretical yield of hydrogen is 2.218 g
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Two important ingredients for baking bread are yeast and flour. To make a loaf of bread of at most 30 servings, maintain a yeast to flour ratio of 1:200. If you're making a loaf of more than 30 servings, use a ratio of 1:180.
To make a loaf of bread with a maximum of 30 servings, you should use a yeast to flour ratio of 1:200.
If you're making a loaf of more than 30 servings, use a ratio of 1:180. This ratio ensures that you have enough yeast to properly rise the dough, while preventing the bread from becoming too dense.
If the ratio is too high, the bread will not rise as much as desired, resulting in a denser loaf. If the ratio is too low, the bread will not have enough structure and will be too soft.
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How many sp2-hybridized carbon atoms are in the structure shown below? CH2=CHOCH2CH=CH2
А 5 B 4 C 2
D 0 E 3
sp2-hybridized carbon atoms in the structure CH2=CHOCH2CH=CH2 are B) 4.
How many sp2-hybridized carbon atoms are in the structure ?There are 4 sp2-hybridized carbon atoms in the structure shown. The hybridization of carbon atoms can be determined by counting the number of sigma bonds and lone pairs of electrons attached to each carbon atom. In the structure shown, each sp2-hybridized carbon atom is bonded to 3 other atoms (2 other carbons and 1 hydrogen or another element) and has no lone pairs of electrons. Therefore, there are 4 sp2-hybridized carbon atoms in the structure.
Carbon atom is sp2 hybridized when bonding takes place between 1 s-orbital with two p orbitals.
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Which i the mot effective way to decreae water pollution?
A: Pa law controlling the number of fih that can be caught in the ocean
B: Pa law regulating what factorie can emit into the air and pour out onto the ground
C: Convert foret into farmland
D: Convert wild habitat into parkland and zoo
Pa law regulating what factories can emit into the air and pour out onto the ground is the mot effective way to decreae water pollution.
What are the different methods used to decrease water pollution?
There are several methods used to decrease water pollution. One method is to regulate industrial and agricultural practices, such as implementing laws that control the amount of pollutants that can be discharged into waterways. Another method is to improve sewage treatment processes, so that waste is properly treated before being released into the environment. Additionally, implementing best management practices in agriculture, such as reducing fertilizer and pesticide use, can help decrease water pollution. The use of green infrastructure, such as rain gardens, can also help reduce runoff and prevent pollutants from entering waterways. Educating the public and promoting sustainable practices, such as reducing single-use plastic usage, can also help decrease water pollution. Each method has its own strengths and limitations, and a combination of approaches may be needed to effectively decrease water pollution.
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at stp (standard temperature and pressure), 0.280 l of a gas weighs 0.400 g. calculate the molar mass of the gas.
At STP, the molar mass of gas with mass 0.400 g is equals to the 32.2580 grams per mole.
We have a gas in STP ( standard temperature and pressure) condition. Our goal in this problem is to calculate the molar mass of the gas.
Volume of gas, V = 0.280 litre
Mass of gas = 0.409 g
STP is nothing but Standard Temperature and Pressure. The standard temperature is 273K the standard pressure is 1 atm pressure.
We know, the ideal gas equation is represented as PV = nRT
where, P ---> pressure
V --> Volume of gas
R--> gas constant
T --> temperature
n --> number of moles of gas
First, we determine the number of moles:
so, n = PV/RT
plugging all known values in above formula to determine the value of n,
=> n = (1 atm × 0.280 L) /( R × 273 K)
Also, Value of gas constant, R = 0.0821 atm L/K/mol
=> n= (1 atm × 0.280 L) /(0.0821 atm L/K/mol × 273 K)
=> n = 0.0124 mol
Molar mass of substance, M = mass of substance/number of moles
Thus, molar mass of gas = 0.400g/0.0124mol
Hence, the molar mass of gas is 32.2580 g/mol.
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naphthalene is a primary component of mothballs; they readily sublime at room temperature. the heat of sublimation for naphthalene, c10h8, is 72.9 kj/mol. how much energy is needed to sublime 15.0 grams of naphthalene? (molar mass
The energy required to sublime 15 grams of Naphthalene is 8.54 kJ.
To find the amount of energy needed to sublime 15.0 g of naphthalene, we need to first determine the number of moles of naphthalene, and then multiply that by the heat of sublimation.
First, we need to find the number of moles of naphthalene:
15.0 g / 128.17 g/mol = 0.117 mol
Next, we need to multiply the number of moles by the heat of sublimation:
0.117 mol * 72.9 kJ/mol = 8.54 kJ
So, the energy needed to sublime 15.0 g of naphthalene is 8.54 kJ.
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How many electrons are in the Lewis structure of PO43 -?
In the Lewis structure of PO43- there are a total of 32 valence electrons.
What is the straightforward meaning of valence?
The property of an element that influences how many additional atoms of that element can combine is known as valence, sometimes spelled valency.
The phrase, which first appeared in 1868, is used to represent both the general capacity of combination of an element as well as the corresponding numerical number.
What distinguishes valency electrons from valence electrons?
The ability of an atom to establish covalent bonds with other atoms is known as valency, which is different from valence electron.
For bonding and sharing one or more protons with another atom, valence electrons, on the other hand, are the quantity of electrons required for a compound's outer shell to be complete.
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For centuries, fishermen have used shark liver oil to treat a variety of ailments, including general weakness, wounds, and inflammation of the respiratory and gastrointenstinal tracts. In fact, it is an ingredient in the hemorrhoid cream Preparation H. In addition to chemicals such as vitamins A and D, omega-3 fatty acids, and triglycerides, shark liver oil contains approximately 14% 2,6,10,14-tetramethylpentadecane, also known as pristane.
Write the molar mass of pristane?
The molar mass of pristane is 204.4 g/mol.
To calculate the molar mass of a compound, you need to use the chemical formula to determine the number of atoms of each element in the compound.
Then, you can use the atomic weights of each element to calculate the total molar mass. For example, if the compound is water (H2O), the molar mass would be 2 (atomic weight of hydrogen) + 16 (atomic weight of oxygen) = 18 g/mol.
Molar mass is the mass of one mole of any substance. It is defined as the amount of a substance that contains a certain number of molecules or atoms.
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Suppose the following chemical reaction can take place in this mixture:
4HCI(g) + O2(g) → 2H2O(g)+2C2(g)
Of which reactant are there the most initial moles? enter its chemical formula:
In the given chemical reaction, 4HCI (g) reacts with O2 (g) to form 2H2O (g) and 2Cl2 (g). If we consider 4HCI as the reactant with the most initial moles, then its chemical formula is HCl.
HCl, or hydrogen chloride, is a colorless and highly reactive gas that is widely used in various industrial processes. It is commonly used as a starting material for the production of other chemicals such as PVC and Teflon. In this reaction, HCl moles reacts with O2 to form H2O and Cl2. H2O, or water, is a common and essential compound reaction that is widely used in various industries, including agriculture, pharmaceuticals, and personal care products. Cl2, or chlorine, is a highly reactive gas that is widely used in the production of various moles chemicals, such as bleach and other disinfectants. In conclusion, the chemical reaction moles between 4HCI and O2 can result in the formation of water and chlorine, which have significant industrial applications. The most number of initial moles are of HCL
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you need a 35% alcohol solution. on hand, you have a 240 ml of a 25% alcohol mixture. you also have 75% alcohol mixture. how much of the 75% mixture will you need to add to obtain the desired solution?
You will need 60ml of the 75% solution to add to the 240ml of a 25% alcohol mixture.
A solution is a specific kind of homogenous mixture made up of two or more components that is used in chemistry. A solute is a substance that has been dissolved in a solvent, which is the other substance in the mixture. The solvent particles will pull the solute particles apart and surround them if the attractive forces between the solvent and solute particles are stronger than the attractive forces holding the solute particles together. The particles of the solute that are enclosed by the solid solute subsequently disperse into the solution.
Now m be the amount of the 75% mixture and you have 240ml of the 25% alcohol mixture.
75% m + 25%(240) = 35%(m + 240)
75/100m + 25/100 × 240 = 35/100m + 35/100 × 240
divide all by 5 to get,
15/20m + 5/20 × 240 = 7/20m + 7/20 × 240
multiply by 20 to get
15m + 1200 = 7m + 1680
Then it will reduces to,
8m = 480
m = 60ml.
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The term "polyatomic ion" tells us that we are working with a _______ particle made of two or more atoms, joined to form a unit.
Responses
A ionicionic
B covalentcovalent
C chargedcharged
The term "polyatomic ion" tells us that we are working with a covalent covalent particle made of two or more atoms, joined to form a unit. Therefore, option B is correct.
What is polyatomic ion ?Polyatomic ions are ions that have more than one atom. Nitrate ion, NO3-, for example, has one nitrogen atom and three oxygen atoms. A polyatomic ion's atoms are usually covalently bonded to one another and thus remain together as a single, charged unit.
Polyatomic ions are ions composed of two or more atoms joined by covalent bonds but with a net electron deficiency or surplus, resulting in an overall charge on the group.
Thus, option B is correct.
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what is the atomic number for an element whose mass number is 152, which contains 89 neutrons per atom?
The aggregate mass of the protons and neutrons in a nucleus is represented by the letter A, which is also the symbol for protons and neutrons.
What are the parameter for the atomic number?The sum of the number of neutrons and the number of masses, or A, is equal to the number of protons, or the number of atoms we represented by Z, plus the number of masses.
The number of protons in an atom's nucleus or the number of electrons in an electrically neutral atom is the atomic number of that atom. Proton number Equals Atomic number
To determine the atomic mass of a single element's atom, multiply the protons' and neutrons' masses by two.
Therefore, The mass number of an element is determined by the sum of the protons and neutrons: Protons and neutrons make up mass.
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given that 0 k is the lowest possible temperature that can be attained theoretically, which temperatures listed can be achieved for a sample of matter? select all that apply.
-300.0°C 0°C 300.0°F 0°F
The temperatures that can be achieved for a sample of matter are:
-300.0°C
0°C
0 K (or 0°C) is the lowest possible temperature that can be attained theoretically, and -300.0°C is a temperature that can be achieved for a sample of matter. 300.0°F and 0°F are temperatures in the Fahrenheit scale, and are not applicable in this context as the temperatures given are in the Celsius scale. All the temperatures listed can be achieved for a sample of matter except 0 k which is the lowest possible temperature that can be attained theoretically and has no practical meaning in terms of a temperature scale. 0°F and 300.0°F can be achieved as well as they are both on the Fahrenheit temperature scale where 0°F is the freezing point of water and 300.0°F is a high temperature.
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Which functional group(s) is not present in the molecule below?
a. Haloalkane
b. Ketone
c. Ether
d. Ester
All the functional groups except ether are present in the molecule.
Which functional group is not present in molecules?A functional group is a group of atoms in a molecule with distinguished chemical properties, any way of the other atoms in the molecule. The atoms in a functional group are associated with each other and to the rest of the molecule by covalent bonds. However, sodium is an element, a metal, it is not a functional group.
Some of the main functional groups in biological molecules involve hydroxyl, methyl, carbonyl, carboxyl, amino, phosphate, and sulfhydryl groups. These groups play an important role in the genesis of molecules like DNA, proteins, carbohydrates, and lipids.
So we can conclude that The functional groups perform a vital activity in producing molecules like proteins, DNA, lipids, and carbohydrates.
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calculate the freezing point of a solution of 40.0 g benzoic acid, c7h6o2, dissolved in 800. g of benzene, c6h6. k f for benzene is 5.10°c/m and the freezing point is 5.50°c for benzene.
The freezing point of a solution of 40.0 g benzoic acid is 5.245 °C.
The freezing point depression of a solution can be calculated using the equation ΔTf = Kf × molality, where ΔTf is the change in the freezing point, Kf is the molal freezing point depression constant, and molality is the concentration of the solute in mol/kg of solvent.
The molality of the solution can be calculated by dividing the mass of the solute (40.0 g of benzoic acid) by the mass of the solvent (800.0 g of benzene) and converting the result to moles.
Molality = (40.0 g of benzoic acid) / (800.0 g of benzene) = 0.05 mol/kg
Next, we can calculate the change in the freezing point using the equation ΔTf = Kf × molality
ΔTf = (5.10 °C/m) × (0.05 mol/kg) = 0.255 °C
Finally, we can calculate the freezing point of the solution by subtracting the change in the freezing point from the freezing point of the pure solvent.
Freezing point of solution = (Freezing point of pure solvent) - ΔTf = (5.50 °C) - (0.255 °C) = 5.245 °C
The freezing point of the solution of 40.0 g of benzoic acid dissolved in 800.0 g of benzene is 5.245 °C.
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Silicon dioxide, also known as silica, is an oxide of silicon. It is most commonly found in nature as quartz and in various living organisms. Given 1.5 mol of SiCl2 and 1.8 mol of H2O, answer the following questions using the balanced chemical equation below:
SiCl4(g) + 2 H2O(g) → SiO2(s) + 4 HCl(g)
A. The limiting reactant is and the reactant in excess is
B. The amount of SiO2 produced is based on
C. The theoretical yield of SiO2 produced is
Since SiCl2 is the limiting reactant, the amount of SiO2 produced is limited by the amount of SiCl2 present. Therefore, the theoretical yield of SiO2 is equal to 1.5 moles, which is the same amount of SiCl2 used in the reaction.
What is the moles?Moles are small burrowing mammals that belong to the Talpidae family. They are found in the Northern Hemisphere and can be identified by their claws, distinct snouts, and velvety fur. Moles primarily feed on insects, earthworms, and other small invertebrates, and they use their long claws to dig extensive networks of tunnels beneath the surface of the ground. Moles are usually solitary animals but may live in small family groups. They have poor eyesight but an excellent sense of smell, and they are active both day and night.
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Consider the reaction.KCl+Pb(NO3)2⟶KNO3+PbCl2KCl+Pb(NO3)2⟶KNO3+PbCl2Identify which species will precipitate in aqueous solution.A)KClKClB)KNO3KNO3C)Pb(NO3)2Pb(NO3)2D)PbCl2PbCl2
The reaction : Pb(NO3)₂ + KCl ----> PbCl₂ + KNO₃ , the specie which will precipitate in the queous solution is the correct option is D) PbCl₂ .
The complete balanced equation is as :
Pb(NO3)₂(aq) + 2KCl(aq) ----> PbCl₂(s) + 2KNO₃(aq)
The potassium ion belongs to the 1 group. The 1 group salt are generally soluble salts. Therefore the KCl is soluble in water. Most of the salt containing the nitrates ion are soluble in the salt. Therefore , the Pb(NO3)₂ and KNO₃ are soluble in the aqueous solution. The salts of lead halide are not soluble.
Therefore, the PbCl₂ will form the precipitate in the chemical reaction.
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a support rod is said to be solid titanium. you conduct some experiments at room temperature and discover that it displaces 87.82 ml of water and has a mass of 395.2 g. can this really be made of pure titanium?
It follows that for every 151.71 g of ilmenite, 180.0 g will contain 47.857 g of titanium. In light of the fact that 151.71 g of ilmenit contains 47.857 g/mol of titanium.
The maximum mass of 56.78 g of pure titanium may be obtained from 180 g of ilmenite, a titanium ore with the chemical formula FeTiO3. The highest possible extraction of pure titanium can be calculated using the formula below: The molar mass of ilmenite is 151.71 g mol 1. Ilmenite is expected to weigh 151.71 g per mole, according to this. According to the chemical formula of the substance, one mole of ilmenite will also contain one mole of iron Fe, one mole of titanium Ti, and three moles of oxygen O. In light of the fact that 151.71 g of ilmenite contains 47.857 g/mol of titanium.
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determine the molarity of a kbr aqueous solution that is 11.5% by mass given that its density is 1.104 g/ml.
The molarity of a KBr aqueous solution that is 11.5% by mass given that its density is 1.104 g/ml is 0.0093 M.
To determine the molarity of a KBr aqueous solution, you need to know the molar mass of KBr and the mass of KBr in the solution.
Given that the solution has a density of 1.104 g/mL and is 11.5% by mass, you can calculate the mass of KBr in the solution and then convert it to moles. Then, divide the number of moles by the volume of the solution to obtain the molarity.
The molar mass of KBr is 119.00 g/mol.
Mass of KBr in the solution = 11.5 g/100 g * 1000 g = 115 g
Number of moles of KBr = 115 g / 119 g/mol = 0.966 mol
Volume of the solution = 115 g / 1.104 g/mL = 104 mL
Molarity = 0.966 mol / 104 mL = 0.0093 M
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1.2.1. determine the amount of energy released (in calories) when steam at 110°c (constant pressure) condenses and cools to produce 500 liters of water at 50°c?
The amount of energy released when steam at 110°C condenses and cools to produce 500 liters of water at 50°C is approximately 2.69 x 10^7 calories.
The amount of energy released during a phase change, such as condensation, can be calculated using the formula:
Q = mL
where Q is the amount of energy released, m is the mass of the substance undergoing the phase change, and L is the substance's latent heat of vaporization. The latent heat of vaporization is the amount of energy required to convert a given amount of a substance from a liquid to a gas at constant temperature.
In this case, we want to find the amount of energy released when steam at 110°C condenses and cools to produce 500 liters of water at 50°C. First, we need to convert the volume of water to mass:
500 liters of water = 500 liters * 1000 g/liter = 500,000 g
Next, we need to find the latent heat of vaporization of water at 110°C. According to data from steam tables, the latent heat of vaporization of water at this temperature is approximately 2257 J/g.
Finally, we can use the formula to calculate the amount of energy released:
Q = (500,000 g) * (2257 J/g) = 1.13 x 10^8 J
To convert this value to calories, we can use the conversion factor of 1 calorie = 4.184 J:
1.13 x 10^8 J / 4.184 J/cal = 2.69 x 10^7 calories
So, The amount of energy released when steam at 110°C condenses and cools to produce 500 liters of water at 50°C is approximately 2.69 x 10^7 calories.
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