Other Chemistry Answers

How many formula units are in 8.70X10^5 moles of CuCl2?

What is the molarity of a 85% H2SO4 solution with a density of 1.2 g/mol?

Q is a ficticious element. If the molar mass of the Q is 5.36grams/mol and you have 8.76 moles of Q, how many grams is this?

calcium is a group 2 metal which reacts with nitric acid according to the balanced symbol equation:

Ca + 2HNO3 - Ca (NO3)2 + H2

(relative atomic mass: H=1 N=14 0=16 Ca=40

0.2g of calcium metal was reacted with excess nitric acid. calculate the volume of hydrogen gas which was produced in this reaction

Predicting products of H2SO4+H2O+CuO  then balance.

30.00g of K2SO4 is dissolved in 200g of water. The percent by weight of K2SO4 in the solution is

A. 60.00%

B. 13.04%

C. 15.00%

D. none of the given answers

E. 30.00%

Which of the following is NOT a primary standard for H2SO4?

A. Na2CO3

B. none of the given answers

C. HgO

D. CaCO3

E. (CH3OH)3CNH2

Which of the following will lead to errors in an analysis? 

A. In the gravimetric determination of SO4-2, the BaSO4 precipitate is filtered off right after it is precipitated.

B. all of the given answers.

C. phenolphthalein indicator was used in an NH3 vs. H2SO4 titration

D. the equivalent weight of sodium carbonate used in the calculation of a titration with HCl to the PP endpoint is 106 grams

E. The standard KMnO4 solution was stored in a clear glass bottle after standardization.

A process wherein a precipitate is allowed to stand in the presence of the mother liquor to allow large crystals to grow at the expense of small ones is called

A. peptization

B. adsorption

C. flocculation

D. none of the given answers

E. condensation

Which of the following methods uses an adsorption indicator? 

A. Volhard method for Cl-

B. Mohr method for Ag+

C. none of the given answers

D. Ceric titration

E. Fajan's method for Ag+