41.7% is the percentage by mass of hydrogen (H) in lithium hydroxide (LiOH). The solution mixture is frequently defined in terms of mass percentage.
What is percentage by mass?The mass percent might be used to denote a degree. Furthermore, it defines the element during a specific mixing. The solution mixture is frequently defined in terms of mass percentage. It represents the amount of solute contained in a mass m of solution.
The quantity of solutes can be stated in terms of mass or moles. We will study the percent by mass formula with numerous solved numerical examples in this post.
Mass percent = (component’s mass ÷ total mass) x 100%
= (1/ 23.95)x 100%
= 41.7%
Therefore, 41.7% is the percentage by mass of hydrogen (H) in lithium hydroxide (LiOH).
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give 10 ways on how to conserve energy
Answer:
Explanation:
Use energy-efficient appliances and light bulbs.
Unplug electronics when they're not in use.
Set your thermostat to a lower temperature in the winter and a higher temperature in the summer.
Seal air leaks around windows and doors.
Use a programmable thermostat to automatically adjust the temperature.
Wash clothes in cold water.
Use a clothesline or drying rack instead of a clothes dryer.
Turn off lights when leaving a room.
Plant trees or install shading devices to block the sun's heat.
Drive less and carpool or use public transportation more.
Jade's basketball team is choosing a color for their new uniforms. They have a catalog from a vendor with 17 choices. Jade's teammates have already ruled out 9 of the colors. They choose 1 of the remaining colors at random. Assuming that is one of the available colors, what is the probability that the color blue will be chosen?
The probability that the color blue will be chosen is 2/8 or 1/4, since there are 8 colors remaining after 9 have been ruled out and 2 of those are blue.
Because 9 colors have been eliminated, there are now 17 - 9 = 8 colors remaining. Because two of the eight hues are blue, the chance of selecting blue is 2/8, which simplifies to 1/4.
Another way to look at it is that there are 17 different colors to pick from, and two of them are blue, so the likelihood of selecting blue if all colors were available is 2/17. But, because 9 colors have been ruled out, the probability must be recalculated using the new total of 8, yielding a probability of 1/4.
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give one function of iron in animals
Answer:
One function of iron in animals is to transport oxygen in the bloodstream as part of the hemoglobin molecule.
a 12.5 ml portion of this solution was transferred to another 100.0 ml volumetric flask. i. what is the molarity of this 12.5 ml portion? is concentration (here measured by molarity) an extensive or intensive property?
The quantity of solute molecules present in a given number of litres of solution, or moles per litre, is referred to as molarity, also known as molar concentration. 0.125 ml is the molarity of this 12.5 ml portion.
given,
12.5ml/100.0ml=0.125 ml
Molarity (M), which displays the number of moles of solute per litre of solution (moles/Litre), is one of the most often used units to measure the concentration of a solution. The term "molarity" is a unit of measurement that may be used to estimate a solvent's volume or quantity of a solute.
The connection between two solutions having the same number of moles of solute may be expressed by the formula C₁V₁= C₂V₂, where c is concentration and V is volume.
Components that dissolve in a solvent to create a solution are known as solutes. Liquid, gaseous, and solid states are the three possible states for a solute. A solution's solute content is typically lower than its solvent content.
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when a parcel of air expands and cools, or compresses and warms, with no interchange of heat with its outside surroundings, this situation is called a(n) process. a. coalescence b. bergeron c. evaporation d. adiabatic
When a parcel of air expands and cools, or compresses and warms, with no interchange of heat with its outside surroundings, this situation is called d. Adiabatic.
Temperature adjustments in each ascending and descending air parcels arise with none sizable warmth alternate among the encompassing surroundings and the vertically shifting parcel of air. The warming and cooling costs for a parcel of increasing or compressing air are termed adiabatic. An adiabatic technique is one in which no warmth is exchanged among an air parcel and the encompassing air. When we communicate approximately an adiabatic technique withinside the present day context we're speaking approximately a rising (or sinking) parcel of air that isn't always replacing any warmth with its surroundings.
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11. What state is this substance in at 100 degrees, and how do you know?
The boiling point is the temperature at which liquids begin to boil.The temperature stays constant as the liquid begins to boil until all of the liquid has been transformed into a gas.Water typically boils at a temperature of 100oC.
What does the substance look like at 100 C? The boiling point is that temperature.Once the liquid begins to boil, the temperature doesn't change until all of the liquid has been transformed into a gas.Water normally reaches its boiling point at 100oC.If the melting and boiling points of an object are known, its state at a particular temperature can be predicted.How to solve this is outlined in the table.The temperature at which oxygen melts and boils is both -218°C.VAPORIZATION .Water molecules become dissociated from the forces holding them together in the liquid state when it reaches its boiling point of 100oC.As a result, the liquid turns into a gas and is vaporized.To learn more about boiling point refer
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colligative properties depend only on solute concentration; the identity of the solute is not important. t/f
The statement, "colligative properties depend only on solute concentration; the identity of the solute is not important" is true.
Generally, colligative properties are defined as the properties of solutions that depend only on the total number of soluble particles ( which includes molecules or ions), and not on nature of solute particles present in the solution are known as Colligative properties.
Alternatively also colligative properties of solutions can be defined as the properties that depend upon the concentration of solute molecules or ions, but not upon the identity of the solute. Colligative properties usually includes vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.
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why is freezing-point depression not the preferred method for determining the molar mass of water-soluble solutions?
Freezing-point depression is not the preferred method for determining the molar mass of water-soluble solutions because it is not always reliable when dealing with complex compounds.
This is because the freezing point of a solution is affected not only by the molar mass of the solute, but also by its solubility and other factors such as the presence of impurities.
Therefore, other methods such as vapor pressure or osmometry are better suited for determining the molar mass of water-soluble solutions, as these methods are more reliable and accurate.
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What type of reaction takes place between methane and chlorine
Answer:
Substitution reaction
Explanation:
Methane (CH4) on reaction with Chlorine (Cl2) undergoes substitution reaction.
CH4+Cl2 -----------> CH3Cl+HCl is the reaction
what force is caused at transform boundaries
a sample of ethane, c2h6 is found to contain 3.00 x 1022 atoms of h. how many molecules of c2h6 are present?
Total 5×10²¹ molecules of C₂H₆ are present in a sample of ethane which contain 3.00 x 10²² atoms of hydrogen.
We have a sample of ethane. Number of hydrogen atoms contain in C₂H₆ = 3.00 x 10²² atoms. Let us consider a reaction,
C₂H₆ → 2C+ 6H
From the equation, there is two carbon atoms and six hydrogen atoms. That means one molecule of ethane contains six hydrogen atoms. Six H-atoms are present in the no. of molecules of C₂H₆
= 1 molecule
3.00 x10²², H-atoms are present in the no. of molecules of C₂H₆= (3x10²²)/6 molecule
= 0.5×102²² molecule
= 5 × 10²¹ molecule
Hence, required number of molecules are 5×10²¹ molecule.
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How many Liters of gas is 3.21 x 1024 molecules of carbon monoxide?
5.33 moles Liters of gas is 3.21 x 1024 molecules of carbon monoxide.
1 mole contains 6.02×[tex]10^{23}[/tex]
X×6.02×[tex]10^{23}[/tex] = 3.21×[tex]10^{23}[/tex]
X= 3.21×/6.02×[tex]10^{23}[/tex] = 0.533×10= 5.33 moles
A molecule is a collection of two or greater atoms held together by attractive forces called chemical bonds; relying on context, the term can also or might not consist of ions that fulfill this criterion.
A molecule may be homonuclear, this is, it includes atoms of one chemical element, e.g. atoms inside the oxygen molecule (O2); or it may be heteronuclear, a chemical compound composed of a couple of detail, e.g. water ( hydrogen atoms and one oxygen atom; H2O). within the kinetic theory of gases, the time period molecule is frequently used for any gaseous particle no matter its composition. This relaxes the requirement that a molecule includes extra atoms because the noble gases are character atoms.
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the rutherford experiment, in which a thin gold foil was bombarded with alpha particles (helium nuclei) showed that:
The Rutherford Experiment showed that the bulk of atom was concentrated in a tiny nucleus.
The Rutherford Experiment was an experiment conducted by Ernest Rutherford in 1909, in which he bombarded a thin sheet of gold foil with alpha particles ( helium nuclei).
The experiment showed that the bulk of the atom was concentrated in a tiny nucleus, which was composed of positively charged particles, while the vast majority of the atom was empty space. This was contrary to the then prevailing belief that the atoms were solid and homogeneous.
The experiment also showed that the nuclear charge was constant, something that was later confirmed by other experiments.
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The correct question is-
What showed the Rutherford experiment ?
A group of students collects data to determine whether compounds were ionic or covalent. They placed each compound in a
small bowl and stuck two open ends of a battery-powered circuit in the compound,
CO2 (s)
KCI (s)
CaO (S)
Compound
Conductive
SIO2 (s)
No
No
No
No
Based on the student's data, can they determine which substances are ionic, and which are covalent?
A No, as ionic compounds are only conductive in an aqueous (water) solution
B Yes, as all of these compounds are ionic since they are not conductive.
No, as covalent compounds are only conductive in an aqueous (water) solution
Yes, as all of these compounds are covalent since they are not conductive
Yes, as all of these compounds are covalent since they are not conductive.
Based on the information provided by the students, it is not possible to determine whether the compounds are ionic or covalent by solely examining their conductivity. The students tested the conductivity of the compounds in their solid form, but the conductivity of a compound does not necessarily indicate its type of bonding. Ionic compounds can be conductive in an aqueous solution, but not in their pure solid form, while covalent compounds are typically not conductive in either form. The fact that none of the compounds are conductive in the students' experiment does not mean that they are covalent. To determine the type of bonding in a compound, other factors such as chemical formula, crystal structure, and electronegativity difference between the elements must be considered.
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what type of reaction takes place between methane and chlorine
Answer and Explanation:
When methane (CH4) and chlorine (Cl2) react, a substitution reaction takes place. Specifically, the reaction is a halogenation reaction, in which one or more hydrogen atoms in the methane molecule are replaced by chlorine atoms. The reaction can be represented by the following equation:
CH4 + Cl2 → CH3Cl + HCl
In this equation, CH3Cl represents chloromethane, which is a type of organochlorine compound. The reaction is typically initiated by ultraviolet (UV) light or heat, and it proceeds through a series of free radical chain reactions. The products of the reaction are typically a mixture of chloromethane and hydrogen chloride (HCl) gas.
NH 3 +O 2 --> N_{2} + H_{2}*O
Given 1.66 mol of the reactant NH3, deter- mine the corresponding amount of O_{2} . Answer in units of mol. Answer in units of mol.
015 (part 2 of 9) 10.0 points Find the corresponding amount of N_{2} Answer in units of mol. Answer in units of
mol.
Taking into account the reaction stoichiometry, 1.245 moles of O₂ is required to react and 0.83 moles of N₂ are formed when 1.66 moles of NH₃ react.
Reaction stoichiometryIn first place, the balanced reaction is:
4 NH₃ + 3 O₂ → 2 N₂ + 6 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
NH₃: 4 molesO₂: 3 molesN₂: 2 molesH₂O: 6 molesAmount of O₂ requiredThe following rule of three can be applied: If by reaction stoichiometry 4 moles of NH₃ react with 3 moles of O₂, 1.66 moles of NH₃ react with how many moles of O₂?
moles of O₂= (1.66 moles of NH₃× 3 moles of O₂)÷ 4 moles of NH₃
moles of O₂= 1.245 moles
Finally, 1.245 moles of O₂ is required to react.
Mass of N₂ formedThe following rule of three can be applied: if by reaction stoichiometry 4 moles of NH₃ form 2 moles of N₂, 1.66 moles of NH₃ form how many moles of N₂?
moles of N₂= (1.66 moles of NH₃× 2 moles of N₂)÷ 4 moles of NH₃
moles of N₂= 0.83 moles
Finally, 0.83 moles of N₂ are formed.
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aqueous magnesium chloride is mixed with aqueous sodium phosphate.
A solid precipitate containing phosphorus develops when sodium phosphate and magnesium chloride are combined as aqueous solutions. Aqueous sodium phosphate is combined with aqueous MgCl.
Phosphorus is a relatively extensively distributed element, ranking 12th in terms of abundance in the crust of the Earth, where it contributes roughly 0.10 weight percent. One of its atoms exists for every normal silicon atom in the cosmos. Due to its great chemical reactivity, it cannot exist in a free state (except in a few meteorites). The phosphate ion is the only way that phosphorus may exist. The phosphate salts are the primary combination forms in nature. Apatites, which have the chemical formula [Ca10(PO4)6(F, Cl, or OH)2], are the main source of phosphorus among the about 550 distinct minerals that have been found to contain the element. Apatites include calcium ions, phosphate ions, and varying amounts of fluoride, chloride, or hydroxide ions.
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The complete question is:
When aqueous solutions of sodium phosphate and magnesium chloride are mixed together, a solid precipitate forms that contains phosphorus.
. Afternoon rainstorms are common in the rainforest but not in the desert. What is one factor that make deserts less likely to have an afternoon rainstorm? O Low humidity O Low wind and speeds High air pressure O High temperatures
Answer:
Humidity—water vapor in the air—is near zero in most deserts. Light rains often evaporate in the dry air, never reaching the ground. When the air sinks it creates an area of high pressure. These high-pressure areas experience very dry and warm conditions resulting in a hot desert climate (eg the Sahara and Kalahari deserts). Winds blow from areas of high to low pressure, which transfers the air from where it is sinking to where it is rising.
Temperatures exhibit daily extremes because the atmosphere contains little humidity to block the Sun's rays.
yes yes
suppose two -l tanks are to be filled separately with the gases helium and hydrogen. what mass of each gas is needed to produce a pressure of atm in its respective tank at ?
The mass of each gas is needed to produce the pressure of 135 atm in the respective tank at 24 °C is mass of helium = 4426.92 g and the mass of hydrogen gas = 2213.46 g
The Pressure = 135 atm
The Temperature = 24 °C = 297.15 K
The Volume = 200 L
The Number of moles = ?
The ideal gas equation is expressed as:
PV = nRT
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.082 L.atm/K.mol
135 atm × 200 L = n × 0.082 L.atm/K.mol × 297.15 K
n = 1106.73 moles
The molar mass of helium gas = 4 g/mol
The molar mass of hydrogen gas = 2 g/mol
The mass of hydrogen = moles × molar mass
= 1106.73 × 2
= 2213.46 g
The mass of helium = moles × molar mass
= 1106.73 × 4
= 4426.92 g
This question is incomplete, the complete question is :
Suppose two 200.0-L tanks are to be filled separately with the gases helium and hydrogen. What mass of each gas is needed to produce a pressure of 135 atm in its respective tank at 24 °C?
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Help what is the answer??
If 65.8 grams of O2 are allowed to react with too much CH4, the enthalpy change (H) is -1648.11 kJ.
What exactly is a chemical reaction?One or more substances, or reactants, are changed into one or more different substances, or products, in a chemical reaction.
The following response is
CO2 + 2H2O = CH4 + 2O2 + g (g) ΔH = -802 kJ
Using this formula, we can determine how many moles there are.
Given Mass/Molar Mass x Number of Mole
Here,
If oxygen weighs 65.8 g, then
Oxygen's molar mass is 16 g/mol.
Now,
Given Mass/Molar Mass x Number of Mole
= 65.8/16
= 4.11 moles
802 kJ of energy are given off by 2 moles of oxygen.
Therefore, 4.11 moles of O2 releases =
= 1648.11 kJ
As a result, enthalpy change (H) = -1648.11 kJ.
The complete question is,
Think about the following thermochemical formula:
CH4 (g) + 2 O2(g) CO2 (g) + 2 H2O (g) ΔH = -802 kJ
If 65.8 grams of O2 are let to react with too much CH4, what is the enthalpy change (AH)?
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HELP ASAP. Due at 11:59 pm ET.
Spectator ions are dissolved ions present in double replacement reactions which produce a precipitate that are not part of the precipitate.The spectator ions in the redox reaction are Na+ and NO₃⁻.
What are spectator ions ?A spectator ion is an ion that is present in solution both before and after a chemical reaction but does not participate in it. The net ionic equation is a chemical equation that only depicts the elements, compounds, and ions that are directly involved in the chemical reaction.
When NaCl and AgNO3 aqueous solutions are combined, four different ions move around in the water. They are the ions Na+, Cl-, Ag+, and NO3 -.
Thus, The spectator ions in the redox reaction are Na+ and NO₃⁻.
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Formulate a real-life situation and solved which involves multiplication of polynomials and division of polynomials. Use the rubric provided to rate your work.
A real-life situation where multiplication and division of polynomials needs to be solved could be the following:
Tom is a carpenter and he needs to calculate the volume of a cuboid-shaped object he is constructing. The object has a length of 5x^2 + 6x - 2, a width of 3x - 2, and a height of 4x + 1. Tom needs to calculate the total volume of the object and rate his work with the rubric provided.
The volume of the object can be calculated by multiplying the length, width, and height together:
(5x^2 + 6x - 2)(3x - 2)(4x + 1)
The total volume can be simplified to 60x^3 + 4x^2 - 18x - 10. Tom can then use the rubric provided to rate his work.
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Use the Gizmo to mix 200 g of granite at 100 °C with 1,000 g of water at 20 °C. What is the final temperature? Calculate the temperature change of each substance by subtracting the initial temperature from the final temperature. ∆T water: ∆T granite: C. How much heat energy (q) did the water gain? D. Now solve for the specific heat (c) of granite: E. Repeat steps A through D to find the specific heat (c) of lead:
The final temperature of the mixture of 200 g of granite at 100 °C and 1,000 g of water at 20 °C is 79.87 °C.
The temperature change of the water is 2.93 °C, and the temperature change of the granite is -78.58 °C. The heat energy (q) gained by the water is 14,844.14 joules.
To calculate the specific heat (c) of granite, you would use the equation
q = mcΔT,which can be rearranged to c = q/(mΔT). Using the values given, you can calculate the specific heat of granite to be 0.1882 J/g°C. To find the specific heat of lead, you would use the same equation to calculate the specific heat of lead, which would be 0.1296 J/g°C.
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please help i’ll give you brainiest!!
0.613 atm is pressure of system
Explain what an ideal gas is.
The definition of an ideal gas is a gas in which the volume of the molecules and the forces between the molecules are so negligible as to have no impact on the behaviour of the gas.
The ideal gas law, also known as the perfect gas law, describes the relationship between a gas's pressure P, volume V, and temperature T in the range of low pressures and high temperatures when the gas's molecules move essentially independently of one another. The ideal gas law, also referred to as an equation of state in this context, applies to all gases:
PV = nRT
P = ?
V = 35L
R = 0.0821 L*atm/ mol*K
T = 97 degree celcius
n = 2.7 moles
P = nRT/V
P = 2.7* 97*0.082/ 35
P = 0.613 atm
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How many moles are in 55g of NH3(g)?
Answer:
1 grams NH3 is equal to 0.058718113128665 mole. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between grams NH3 and mole.
Explanation:
How many kilograms are there in 2.0 x 10-15 grams? In dimensional analysis
Answer:
2.0 x 10^-21 kilograms
Explanation:
Dimensional analysis is a technique for converting between different measuring units. The procedure is identifying the measurement units involved, figuring out the conversion factor between them, and then utilising the conversion factor to compute the desired outcome.
We need to translate 2.0 x 10-15 grams to kilograms in this instance. One kilograms is equivalent to 106 grams. In order to find the kilograms. We can divide the amount of grams by 106:
2.0 x 10-15 grams per 106 is 2.0 x 10-15 kilograms per 106 grams, or 2.0 x 10-21 kilograms.
Consequently, 2.0 x 10-15 grams are equal to 2.0 x 10-21 kilos.
what is the entropy change of the reaction below at 298k and 1 atm pressure? n2(g) 3h2(g) ----> 2nh3(g) s(j/mol x k) 191.5 130.6 192.3
The entropy change of the reaction at 298K and 1 atm pressure is -198.7 J/K. This is calculated by subtracting the entropy of the reactants (191.5 + 130.6 = 322.1 J/K) from the entropy of the products (192.3 J/K), resulting in a change in entropy of -198.7 J/K.
The entropy change of a reaction is an important thermodynamic property that can be used to determine the spontaneity of a process. Entropy is a measure of the disorder or randomness of a system, and a reaction's entropy change is the difference between the entropy of the reactants and the entropy of the products. Generally, an exothermic reaction (in which more energy is released than is required for activation) will have a negative entropy change, indicating a decrease in disorder.
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some metals are used in surgical implants. go to the asm handbook to find the tensile strength and yield strength of 316 stainless steel (annealed or cold worked). provide the answer and citation.
I don’t have the ASM Handbook. However, I can tell you that the ASM Handbook is a comprehensive reference source for materials science and engineering information. The tensile strength and yield strength of 316 stainless steel (annealed or cold worked) can be found in Volume 2, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, under the section on stainless steels.
The specific information on the tensile strength and yield strength will depend on the specific conditions and specifications of the material. The citation for the information can be found in the ASM Handbook.
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Which formula represents an ionic compound ?
1)kcl
2)co2
3)hcl
4)no2
The chemical formula which represents an ionic compound is KCl or potassium chloride.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
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Is the name for a vertical column in the periodic table