Questions
Glucose-Fructose mixture concentration was 73 µg/mL. what is the concentration of glucose in the mixture? total...

Glucose-Fructose mixture concentration was 73 µg/mL. what is the concentration of glucose in the mixture? total volume = 25ml

In: Chemistry

How to I.D major species and minor species in chemistry?

How to I.D major species and minor species in chemistry?

In: Chemistry

A student is studying a reaction between reactants A and B. the reaction is second order...

A student is studying a reaction between reactants A and B. the reaction is second order with respect to A, but zero order with respect to B. Explain in 5-6 sentences what this means.

If the Concetration of A is tripled what will the effect be on the reaction rate?

If the concentration of B is increased 10 times, what will the effect be on the reaction rate?

In: Chemistry

12.) Boiling point elevation- Given that the Kb for water is 0.51° C/m, calculate the boiling...

12.) Boiling point elevation- Given that the Kb for water is 0.51° C/m, calculate the boiling point of a solution containing 71.0 g of Na2SO4 dissolved in 350 g of water.


In: Chemistry

If a solution containing 48.32g of mercury(II) acetate is allowed to react completely with a solution...

If a solution containing 48.32g of mercury(II) acetate is allowed to react completely with a solution containing 15.488g of sodium dichromate, how many grams of solid precipitate will be formed?

How many grams of the reactant in excess will remain after the reaction?

Assuming complete precipitation, how many moles of each ion remain in solution? If an ion is no longer in solution, enter a zero (0) for the number of moles.

C2H3O–2

Na+

Cr2O2−7

In: Chemistry

Question 3 (1 point) Which of the following correctly lists the compounds in order of increasing...

Question 3 (1 point)
Which of the following correctly lists the compounds in order of increasing boiling point?
Question 3 options:

1)

CCl₄(l) < NH₃(l) < N₂(l)

2)

N₂(l) < CCl₄(l) < NH₃(l)

3)

CCl₄(l) < N₂(l) < NH₃(l)

4)

NH₃(l) < N₂(l) < CCl₄(l)

5)

NH₃(l) < CCl₄(l) < N₂(l)

Question 4 (1 point)
Which of the following is true?
i. Hydrogen bonding only occurs when hydrogen is bound to oxygen or fluorine.
ii. The secondary structures of proteins are due to hydrogen bonding.
Question 4 options:

1)

i only

2)

ii only

3)

both i and ii

4)

neither i or ii

In: Chemistry

The Henry's law constant for nitrogen gas is 3.91 x 10-2 molal/atm at 20°C. How many...

The Henry's law constant for nitrogen gas is 3.91 x 10-2 molal/atm at 20°C. How many moles of nitrogen gas would be dissolved in a 22.0L aquarium at 20°C, assuming an atmospheric pressure of 1.00 atm, and that the partial pressure of nitrogen gas in air is 0.77 atm? Assume the aquarium water has a density of 1.00 kg/L.

In: Chemistry

A 10.00 g mixture of NaHCO3 and Na2CO3 was heated and yielded 0.0274 moles H2O and...

A 10.00 g mixture of NaHCO3 and Na2CO3 was heated and yielded 0.0274 moles H2O and 0.106 moles CO2. Calculate the percent composition of the mixture.

2NaHCO3 → Na2O + 2CO2 + H2O

Na2CO3 → Na2O + CO2

What is the percent NaHCO3 of the mixture?

What is the percent Na2CO3 of the mixture?

In: Chemistry

Calculate the molarity of each solution. A. 29.2 g of KCl in 0.905 L of solution...

Calculate the molarity of each solution.

A. 29.2 g of KCl in 0.905 L of solution

Express your answer using three significant figures

B. 63.3 g of C2H6O in 3.4 L of solution

Express your answer using two significant figures.

C. 36.2 mg of KI in 110 mL of solution

Express your answer using three significant figures.

In: Chemistry

Silver tarnishes in the presence of hydrogen sulfide (which smells like rotten eggs) and oxygen because...

Silver tarnishes in the presence of hydrogen sulfide (which smells like rotten eggs) and oxygen because of the reaction:

4Ag + 2H2S + O2 → 2Ag2S + 2H2O

a) How many grams of silver sulfide can be formed from a mixture of 1.1 g Ag, 0.10 g H2S, and 0.088 g O2?

b)How many more grams of H2S would be needed to completely react all of the Ag?

In: Chemistry

13) Consider three balloons, all the same size, at the same temperature and pressure. One is...

13) Consider three balloons, all the same size, at the same temperature and pressure. One is filled with hydrogen, one with CO2, and one with nitrogen.

a) which balloon has the greatest density? why?

b) which balloon contains the most molecules? why?

c) Which balloon contains the most atoms? why?

d) which balloon contains the fastest moving molecules? why?

e) which balloon contains the molecules that would effuse the slowest? why?

In: Chemistry

PLEASE ANSWER TRUE OR FALSE THANK YOU! A glass of ice water containing nine ice cubes...

PLEASE ANSWER TRUE OR FALSE THANK YOU!

A glass of ice water containing nine ice cubes will be colder than a similar-size glass of ice water containing only three ice cubes.

True
False

Heat is released when a liquid freezes into a solid.

True
False

All intermolecular forces are broken when a liquid vaporizes into a gas.

True
False

Dispersion forces result from the temporary distortion of the electron cloud in an atom or molecule which increases in magnitude with increasing size.

True
False

Dipole-dipole forces are weaker than dispersion forces.

True
False

Ion-dipole force is considered the weakest of the different types of intermolecular forces.

True
False

Attraction between the Na cation and Cl anion holds the solid lattice of sodium chloride together.

True
False

In: Chemistry

12) What is Graham's law of effusion? Explain it in words. a) Give two formulas representing...

12) What is Graham's law of effusion? Explain it in words.

a) Give two formulas representing this law. Which is more commonly used?

b) which postulate of the kinetic molecular theory of gases does this law relate to?

In: Chemistry

Explain why: Ionic strength increase then activity coefficient decrease Ionic charge increase then activity coefficient increase...

Explain why:

Ionic strength increase then activity coefficient decrease

Ionic charge increase then activity coefficient increase

Ionic size increase then activity coefficient decrease

In: Chemistry

Please explain why dyes attach to natural fibers more readily than synthetic fibers. How do the...

Please explain why dyes attach to natural fibers more readily than synthetic fibers. How do the structures relate?

In: Chemistry