Other Chemistry Answers

What is the pH of 0.23 M HClO2

What is the pH of 1.65 x 10-4 M solution of HBr

What is the pH of 1.65 x 10-4 M solution of HBr

7. What mass of copper(II) sulfate would remain

after removing all the water from 57 g of

CuSO4 · 5 H2O?

Answer in units of g.

12. A chemist wants to extract the gold from 49.06 g of AuCl3 · 2 H2O (gold(III) chloride

dihydrate) by electrolysis of an aqueous solution. What mass of gold could be obtained

from this sample?

Answer in units of g.

Which of the following is not a reason why some substances whose purity cannot be exactly known?

A.because they are non-volatile.

B. they are highly hygroscopic

C. they react with CO2 in air or moisture in air

D.they react moisture in air

How much energy is required to raise the temperature of 18.6 g of water from 15°C to 134°C?

A 2L closed vessel contain 0.1mol nitrogen and 0.3 mol hydrogen, the gas reacted to form ammonia gas. 10min later, the vessel contain 0.22mol hydrogen gas. What is the average rate of hydrogen consume in molL-1min-1.

Consider the reaction 3CaCl2(aq) + 2Na3PO4(aq) --> Ca3(PO4)2(s) + 6 NaCl(aq) (molar mass of calcium phosphate is 310.18 g/mol)


What mass of Ca3(PO4)2 is produced from 94.2 mL of 0.250 M Na3PO4 solution and 275 mL of 0.150 M

For the reaction 2H2 + O2 2H2O, what is the total mass in grams of water formed when 8.00 grams of hydrogen reacts completely with excess oxygen?2

For the reaction 2NaOH + H2SO4--> Na2SO4 + 2H2O, how many moles of Na2SO4 will be produced from 3.50 moles of NaOH if excess H2SO4 is available?