How many molecules are in one drop (0.0500 g) of water 2) True or False a)To convert from grams to moles and vice versa, use Avogadro’s number as a conversion factor. b) To determine mass relationships in a chemical reaction, you first need
1) How many molecules are in one drop (0.0500 g) of water
2) True or False
a)To convert from grams to moles and vice versa, use
b) To determine mass relationships in a chemical reaction, you first need to know the balanced chemical equation for the reaction.
c) Suppose a
3) Magnesium reacts with sulfuric acid according to the following equation. How many moles of H2 are produced by the complete reaction of 230. mg of Mg with sulfuric acid?
Mg(s) + H2SO4(aq) ----> MgSO4(aq) + H2(g)
4) At one time, acetaldehyde was prepared industrially by the reaction of ethylene with air in the presence of a copper catalyst. How many grams of acetaldehyde can be prepared from 81.7 g of ethylene?
2C2H4 (g)+ O2 (g) ----> 2C2H4O(g)
5) Iron ore is converted to iron by heating it with coal (carbon), and oxygen according to the following equation:
2Fe2O3 (s) + 6C(s) + 3O2 (g) ---> 4Fe(s) + 6CO2(g)
6) Benzene reacts with bromine to produce bromoben- zene according to the following equation:
C6H6 (l) + Br2(l) ----> C6H5Br(l) + HBr(g)
If 60.0 g of benzene is mixed with 135 g of bromine,
(a) Which is the limiting reagent?
(b) How many grams of bromobenzene are formed
in the reaction?
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