Balance the following equation between calcium and water:
Ca(s) + H2O(l) ? Ca(OH)2(aq) + H2(g)
What is the stoichiometric coefficient for hydrogen gas (H2) when the equation is balanced with smallest whole number coefficients?
A. |
B. |
C. |
D. |
Acrylonitrile, C3H3N, is an important substance used to make plastics and can be produced by the reaction of propylene (C3H6), ammonia (NH3) and molecular oxygen (O2) with liquid water as a side product:
NH3(g) + C3H6(g) + O2(g) ? C3H3N(l) + H2O(l)
When correctly balanced, the stoichiometric coefficients for reactants and products, respectively, are:
A. |
B. |
C. |
D. |
E. |
Give the correct set of coefficients, in order, to balance the following chemical reaction:
P4O6(s) + H2O(l) ? H3PO3(aq)
A. |
B. |
C. |
D. |
E. |
Which of the following represents the balanced chemical equation for the combustion of pentane, C5H12?
A. |
B. |
C. |
D. |
E. |
For the following chemical reaction, what is the correct value of x, the coefficient for H2O:
wAl2S3(s) + xH2O(l) -> yAl(OH)3(s) + zH2S(g)
A. |
B. |
C. |
D. |
E. |
Which of the following represents the balanced chemical equation for the combustion of butane, C4H10?
A. |
B. |
C. |
D. |
E. |
When the following chemical equation is balanced, what is the sum of the coefficients for all reactants and products?
vFe2(SO4)3(s) + wNH3(g) + xH2O(l) -> yFe(OH)3(s) + z(NH4)2SO4(aq)
A. |
B. |
C. |
D. |
E. |
How many moles of KClO3 are consumed when 1.5 moles of O2 are produced in the following chemical reaction?
2KClO3(s) -> 2KCl(s) + 3O2(g)
A. |
B. |
C. |
D. |
E. |
Metallic copper can be produced by the chemical reaction:
Cu2O(s) + CH4(g) ? Cu(s) + H2O(l) + CO2(g) (unbalanced)
How many grams of copper can be produced by reacting 100. g of Cu2O?
A. |
B. |
C. |
D. |
E. |
Calcium hypochlorite, Ca(OCl)2, is a bleaching agent produced by treating a solution of sodium hydroxide and calcium hydroxide with gaseous chlorine:
NaOH(aq) + Ca(OH)2(aq) + Cl2(g) ? Ca(OCl)2(aq) + NaCl(aq) + H2O(l) (unbalanced)
How many grams of calcium hypochlorite can be produced from 10.0 g of NaOH and excess Ca(OH)2 and chlorine gas?
A. |
B. |
C. |
D. |
E. |