Chemistry Answers

A solution is prepared by dissolving 25g of sucrose in 300 g of water. What is the % by mass of the solute? *

A. 6.55%

B. 9.09%

C. 7.69%

D. 8.33%

What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution? *

0.0058%

B. 0.0585%

C. 0.58%

D. 5.8%

How many bridging oxygen atoms are in the framework of a single sodalite cage

How much potassium iodide (166.00 g/mol) is required to get 1.78 g of 

mercury(I) iodide precipitate (454.39 g/mol). The unbalanced chemical equation is

Determine the pressure exerted by 1 mole of methane placed into a bulb with a volume of 244.6ml at 25degree celcius .carry out two calculations assume methane as an ideal gas and assume methane as a real gas and obeys Vander Waals equations

how many grams are in 2.00 mol of sodium chloride (NaCl)?

The enthalpy and entropy change of a reaction are -3.9 3.9kJ / mole and +56.6 J/mole K respectively at 250 C. What is the free energy change in kJ / mole ? Is this reaction always spontaneous, never spontaneous or does it depend on the temperature ?

6.02x10^-3 / 3.01x10^-2

Using the reaction on below:

Sn(s) + Pb²+ (aq) → Sn²+ (aq) + Pb(s)

a. Write the oxidation and reduction half reaction.

b. Construct a cell diagram.

c. Write the overall equation of the reaction.

d. Solve for the cell potential.

Calculate the boiling point and freezing point of a 1.7 m ethylene glycol solution.