The absorbance of a solution that has a concentration of 1.8 is 152.75.
How to calculate absorbance?The absorbance of a substance can be calculated using Beer's law equation as follows:
A = εmCl
Where;
A = absorbanceεm = molar absorptivityC = concentration of solutionl = path lengthAccording to this question, the following information are given:
A = ?εm = 42.243 M-1cm-1C = 1.8l = 2cmA = 42.43 × 1.8 × 2
A = 152.75
Therefore, the absorbance of a solution that has a concentration of 1.8 is 152.75.
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If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, what will the molarity of the solution be?
Answer:
Explanation:
Molarity = number of moles / volume
If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, which is half of 550 mL, the molarity of the solution with the same number of moles of KCl is 3.5 * 2 = 7.00 M
The molarity of the solution will be 7 M.
What is molarity ?The total count of moles of solute per liter of a particular solution is known as a solution's molarity.
What is solution?The volume of just an object is a measurement of how much space it takes up.
Molarity of the solution can be determined by the formula:
[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]
where, M = molarity of solution. V = volume.
Given data:
[tex]M_{1}[/tex] = 3.50 M
[tex]M_{2}[/tex] = ?
[tex]V_{1}[/tex] = 550 mL
[tex]V_{2}[/tex] = 275 mL
Now, put the value of given data in molarity equation.
[tex]V_{2} = M_{1} V_{1} /M_{2}\\V_{2} = (3.50 M) (550 mL) / (275 mL)\\V_{2} = 7 M[/tex]
Therefore, the molarity of the solution will be 7 M.
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Green gram defination
For grade 7
a leguminous plant, Phaseolus aureus, whose seeds are used as food in India.
Answer:
Green Gram is a small round edible green bean which is also known as moong ki daal in the subcontinent.
Explanation:
The green gram bean which is also known as the mung, maash or moong, is a plant species in the legume family. The green gram bean is mainly cultivated in East, Southeast and South Asia. It is used as an ingredient in both savoury and sweet dishes.
What impact will sea level rise have on farming and water supply?
I
Even a small increase can have devastating effects on coastal habitats farther inland, it can cause destructive erosion, wetland flooding, aquifer and agricultural soil contamination with salt, and lost habitat for fish, birds, and plants.
Explanation:
I hope this helps
Which of the following best illustrates a natural process acting as a constructive force
Answer:
Wind depositing sand to build up sand dunes.
Explanation:
What is the percent by mass of a solution containing 4. 0g of solute in 100g of water? (Percent by mass formula: (mass of solute/mass of solution) x 100) A 40 % B. 3. 8 % 26 % D. 2. 1 %
What determines whether atoms will form chemical bonds.
Answer:
The electron arrangement of the outer energy level of an atom determines whether or not it will form chemical bonds.
Explanation:
Give a difference in physical properties between the chlorine and potassium chloride
Answer:
Chlorine exists as gaseous state while potassium chloride as a solid
Physical properties between the chlorine and potassium chloride are totally different because chlorine is available in gaseous form while potassium chloride available in solid form.
What are physical properties between the chlorine and potassium chloride ?Potassium chloride crystals are composed of face-centered cubic (FCC) unit cells. KCl has a molar mass of 74.5513 grams/mol.
It has a density of 1.984 grams per cubic centimeter when it is solid and crystalline. Potassium chloride has melting and boiling temperatures of 1040 K and 1690 K.
A metal halide salt made of potassium and chlorine is known as potassium chloride. It appears as a white or colorless vitreous crystal and has no odor.
Thus, chlorine is present in gaseous state while ptassium chloride present in solid state.
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Of the following acids, determine a. The strongest acid b. The acid that produces the lowest concentration of hydronium ions per mole of acid
Answer:
The bond strength of an acid generally depends on the size of the 'A' atom: the smaller the 'A' atom, the stronger the H-A bond. When going down a row in the Periodic Table (see figure below), the atoms get larger so the strength of the bonds get weaker, which means the acids get stronger.
Explanation:
The acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
What are weak and strong acids?Strong acids are completely dissociated into a solution.
Examples of strong acids are Hydrochloric acid, sulfuric acid, nitric acid, etc.
Weak acids are those that do not completely dissociate in a solution.
Examples are formic acid, acetic acid, nitrous acid, etc.
Thus, the acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
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What is the molarity if 16. 0 grams of NaOH is dissolved in 855 mL of solution?
Answer:
734.0 grams
Explanation:
Because 16.0 and 855 mL it is 734.0 grams :) hope it helps
Draw the major organic product of the following friedel–crafts alkylation. (an excess of benzene is present. ) do not draw any aluminum byproducts
The Friedel–crafts alkylation provide a nice way of attaching an alkyl group to an aromatic compound.
What is Friedel–crafts alkylation?The Friedel–crafts alkylation occurs when an alkyl group is added to an aromatic compound.
The reaction mechanism commences with the attack of an alkyl halide on an aromatic substrate using AlCl3 as a catalyst. This question is incomplete henece we can not draw the structure of the product. The alkyl portion of the alkyl halide is now attached to the aromatic compound at te end of the reaction.
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0.05 moles of HCL are added to 2 L of H2O. What is the molarity of the solution?
Impossible to answer the question with the information provided.
1.60
0.025M
10.4
The molarity of the solution made by dissolving 0.05 mole of hydrogen chloride (HCl) in 2 L of water (H₂O) is 0.025 M
What is molarity?Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
How to determine the molarity Mole of HCl = 0.05 mole Volume = 2 L Molarity =?Molarity = mole / Volume
Molarity = 0.05 / 2
Molarity = 0.025 M
Thus, the molarity of the solution is 0.025 M
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The molar mass of barium nitrate (ba(no3)2) is 261.35 g/mol. what is the mass of 5.30 × 1022 formula units of ba(no3)2? 0.0900 g 12.0 g 23.0 g 3,130 g
Molar mass is the ratio of the mass to that amount of the substance. The mass of the barium nitrate in the formula unit is 23.0 grams.
What is mass?The mass of a substance is the product of the molar mass of the compound and the number of moles of the compound.
Given,
Molar mass of barium nitrate = 261.35 g/mol
If, [tex]6.022 \times 10^{23}[/tex] have a mass of 261.35 g/mol then, [tex]5.30 \times 10^{22}[/tex] formula units will have a mass of,
[tex]\begin{aligned}& = \dfrac{261.35 \times 5.30 \times 10^{22}}{6.022\times 10^{23}}\\\\&= 23.0\;\rm gm\end{aligned}[/tex]
Therefore, option C. 23.0 gm is the mass of barium nitrate.
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Answer:
CExplanation:
23.0g
During the course of a catalytic reaction the following occurs: 1) Substrate is covalently bound and oriented with proximity to the active site residues. 2) Negative charge builds up on the substrate and is stabilized. 3) Oxidation of the enzyme followed by reduction to complete the catalytic cycle. What type of chemical species can facilitate these reactions? A) nucleophilic amino acids B) electrophilic groups C) prosthetic phosphate groups D) transition metal anions E) transition metal cations
During the course of a catalytic reaction Substrate is covalently bound and oriented with proximity to the active site residues.
The type of chemical species which can facilitate these reactions is transition metal cations.
What is an Enzyme?These are proteins that act as biological catalysts and accelerate chemical reactions.
They function by binding to the substrate and requires the use of transition metal cations which acts as cofactors.
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What is the attraction between water molecules called?.
How many molecules is equal to 46.92 grams of SrF2
Answer:
125.6168064 is the answer
A solution that has a high amount of hydrogen ions is called.
Answer:
a solution with high amount of hydrogen ions is called an acidic solution
What volume of a 0. 120 m cai2 solution would contain 0. 078 mol of the solute?.
Answer:650 mL
Explanation:
Remember that Molarity = mol/L. Rearranging the equation to solve for liters you get L = mol/Molarity.
80x10-3 mol / 12x10-2 M = 6.5x10-1 L
6.5x10-1 L (1x103) = 6.5x10 2 mL = 650mL
NaCl and AgNO3 react in a double replacement reaction. Which is one of the products of this reaction?
NaNO3
AgClO3
CO2
NaAg
Answer:
nano3+agcl2
Explanation:
double displacement reaction
If a reaction is second-order with respect to a particular reactant, when the concentration of that reactant is increased by a factor of 4, the reaction rate will _____
Answer:
A reaction is second order with respect to a reactant.
Rate =k[A]
2
(i) If the concentration of the reactant is doubled, the rate of reaction becomes 4 times .
(ii) If the concentration of the reactant is reduced to half, the rate of reaction becomes one fourth.
Explanation:
If a reaction is second-order with respect to a particular reactant, when the concentration of that reactant is increased by a factor of 4, the reaction rate will increased by factor 16.
How do we calculate the rate of second order reaction?Rate of the second order reaction will depends on the concentrations of one second-order reactant or two first-order reactants as:
Rate(1) = k[A]²
If the concentration of reactant becomes 4 times the initial concentration then rate will be:
Rate = k[4A]²
Rate(2) = 16k[A]²
Rate(2) = 16Rate(1)
Hence rate will increased by 16 times.
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7.13 g of NaF are dissolved in enough water to make 201 mL of solution. What is the molarity of this solution
Answer:
0.846MExplanation:
To find the molarity, we have an equation: moles ÷ liter.
To find the moles of NaF, take the gram ÷ molar mass of NaF
7.13/42.0 = 0.170 moles of NaF
201 ml ÷ 1000 = 0.201L
0.170 ÷ 0.201 = 0.846MWhat are the solutions to problems caused by nitrogen gas in solution at certain depths?
Please Help!!!! 50 points
The solutions to problems caused by nitrogen gas in solution at certain depths is by discouraging deep diving.
What is Diving?
This involves moving around under water with the aid of special breathing equipment.
Limiting the depth of a dive should he encouraged as the maximum depth limit for a diver to use compressed air is 30 to 50 meters.
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An aqueous solution turns litmus red. The ph of this solution could be
If an aqueous solution turns litmus red, the pH of the solution could be the range of 1 - 6.
What is an acid?An acid is a substance that is capable of producing only hydrogen ions (H+) when dissolved in water.
An acid posseses other unique characteristics and are as follows:
Acids are corrosive in their concentrated formAcids turn blue litmus redAcids are sour to tasteThe pH range of an acidic substance is between 1-6.
Therefore, if an aqueous solution turns litmus red, the pH of the solution could be the range of 1 - 6.
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What is the difference between sulphur and sulphur molecules
1. How many moles are in 15.5 g of SO2
2. Find the mass of 1.50 mol C3H8?
3. How many moles is 1.50 x 1023 molecules of NH3 ?
4. Convert 2.50 x 1025 formula units of NaCl into grams.
5. Convert 3.60 mol CO2 into molecules
1. The number of mole in 15.5 g of SO₂ is 0.242 mole
2. The mass of 1.50 mole of C₃H₈ is 66 g
3. The number of mole of NH₃ that contains 1.5×10²³ molecules is 0.249 moles
4. The mass of NaCl that contains 2.5×10²⁵ formula units is 2429.4 g
5. The number of molecules present in 3.6 moles of CO₂ is 2.167×10²⁴ molecules
1. How to determine the mole of SO₂Mass of SO₂ = 15.5 gMolar mass of SO₂ = 32 + (2×16) = 64 g/mol Mole of SO₂ =?Mole = mass / molar mass
Mole of SO₂ = 15.5 / 64
Mole of SO₂ = 0.242 mole
2. How to determine the mass of C₃H₈Mole of C₃H₈ = 1.5 moleMolar mass of C₃H₈ = 44 g/mol Mass of C₃H₈ =?Mass = mole × molar mass
Mass of C₃H₈ = 1.5 × 44
Mass of C₃H₈ = 66 g
3. How to determine the mole of NH₃From Avogadro's hypothesis,
6.02×10²³ molecules = 1 mole of NH₃
Therefore,
1.5×10²³ molecules = 1.5×10²³ / 6.02×10²³
1.5×10²³ molecules = 0.249 mole of NH₃
4. How to determine the mass of NaCl6.02×10²³ units = 58.5 g of NaCl
Therefore,
2.5×10²⁵ units = (2.5×10²⁵ × 58.5) / 6.02×10²³
2.5×10²⁵ units = 2429.4 g of NaCl
5. How to determine the number of molecules1 mole of CO₂ = 6.02×10²³ molecules
Therefore,
3.6 moles of CO₂ = 3.6 × 6.02×10²³
3.6 moles of CO₂ = 2.167×10²⁴ molecules
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What portion of your salt solution in ice water system is: a. A mixture? b. A solution?
The salt and water are a homogeneous mixture but when salt dissolves in the water system is called a solution of salt and water.
What is a mixture?A mixture is defined as the combination of two or more substances that are not chemically bonded together.
There are two types of mixture which include:
Homogeneous (uniform composition) andHeterogeneous mixturesWhen salt is added to the ice water system, it lowers the freezing point of the ice water thereby forming a homogenous mixture of water and salt.
The dissolution of salt in ice water leads to the formation of salt and water solution.
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Assign an oxidation number to each element in the reaction. co(g) 2h2(g) → ch3oh(g) in co, the oxidation number of c is , and that of o is . in h2, the oxidation number of h is . in ch3oh, the oxidation number of c is , that of o is , and that of h is .
The oxidation state is the number of electrons gained and donated. The oxidation state of C is +2, O is -2, H is 0, and in methanol, C is +1, H is +1, and O is -2.
What is the oxidation number?The oxidation number denotes the number of electrons donated and gained after the bond formation. In general, the oxidation state of free elements is zero, and of hydrogen when the bond to non-metal is +1 and with metals is -1.
The chemical reaction is given as,
[tex]\rm CO + 2H_{2} \rightarrow CH_{3}OH[/tex]
Here,
The oxidation number of carbon in carbon monoxide will be +2, and oxygen will be -2.
The oxidation number of hydrogen in dihydrogen will be zero, and in methanol, the oxidation number of carbon will be +1, hydrogen will be +1 and oxygen will be -2.
Therefore, the oxidation number of oxygen is -2 most of the time.
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Draw n‑ethyl‑3‑methylpentanamide. Include all hydrogen atoms
The structure of the compound n‑ethyl‑3‑methylpentanamide is attached to this answer.
What is IUPAC nomenclature?The IUPAC nomenclature was given in order for us to be able to draw the structure of a compound from its name. This is the generally accepted means of naming compounds globally.
The structure of the compound n‑ethyl‑3‑methylpentanamide in which all the hydrogen attched are shown attached to this answer.
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The structure of n‑ethyl‑3‑methylpentanamide. Include all hydrogen atoms are attached. Its chemical formula is C₈H₁₇NO.
What is n‑ethyl‑3‑methylpentanamide?N-ethyl-3-methylpentanamide has a five-carbon parent chain attached to an amide functional group in its structural formula.
An amide's N-atom also has an ethyl substituent. At the C-3 position of the parent chain, a methyl group is substituted.
Thus, the of n‑ethyl‑3‑methylpentanamide. Include all hydrogen atoms are attached. Its chemical formula is C₈H₁₇NO.
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Why might a company decide against using hydroelectric energy as an alternative energy resource?
Because gathering it leaves a negative impact on natural habitats.
Why would you argue this is the best energy source to use?
Answer:
really its tought or we can say confusing
°__°
word equation for magnesium carbonate and nitrate (V)acid.
Answer:
This is an acid-base reaction (neutralization): MgCO 3 is a base, HNO 3 is an acid.
Explanation:
HNO3 + MgCO3 → H2O + CO2 + Mg(NO3)2