Chemistry Test #2
How many moles of Iron (III) oxide are required to completely react with 0.0232 moles of carbon in the following reaction? Fe2O3+3C——>2Fe+3CO
0.00773 mol
What is the mass of 0.724 moles of carbon tetrachloride (the molar mass of CCl4 153.8g) ?
111g
Given the unbalanced equation: C6H6+O2....H2O. When properly balanced, the coefficient of oxygen is:
15
How many moles of hydrogen gas will be .... when 0.500 mol Mg react with Hydrochloric acid according to the following reaction? 2Mg+2HCl——>2MgCl2+H2
0.25 mol
What mass of CO2 is produced when 50.0g C2H4 reacts completely in the following equation? (Molar mass : C2H4 28.0g, CO2 44.0g)
157g
How many molecules are present in 4.00 mol Cl2?
2.41 • 10^24 molecules
When the equation NH4OH+H2SO4—>(NH4)2SO4+H2O is balanced, a term in the balanced equation is:
2H2O
The following reaction: 2FeO —-> 2Fe + O2, is an example of:
Decomposition
The following reaction: LiOH+ HCl—-> LiCl +....is an example of?:
Double displacement
The reaction: 2C2H6+7O2—->4CO2+6H2O+890.4 kJ, is?
Exothermic
What is the molar mass of sodium chloride?
58.44 grams
What is the percent by mass of oxygen in carbon dioxide?
72.71%
What is the percent yield in a reaction in which 1.038 g of a product is actually produced when the theoretical yield is 1.132g?
91.70%
endothermic reaction
A+B+heat —-> C
single replacement reaction
A+BC->AC+B
Exothermic reaction:
A+B—-> C+ heat
synthesis or combination reaction
A+B—->AB
What is the molecular formula of a compounds empirical formula CH2CL and molar mass.....*?
C2H4Cl2
What is the empirical formula of a compound that consists of 39.99% carbon, 6.73% hydrogen, and 53.28% oxygen?
CH2O
Which shows a balanced chemical equation for the complete combustion of methane (CH4) gas?
CH4+2O2—->CO2+2H2O
One mole of glucose, C6H12O6, contains 24...*?
False
double replacement reaction
AB + CD --> AD + CB
decomposition reaction
AB—->A+B
For the reaction: N2+3H2—->2NH3. Which of the following is the limiting reactant if 78g of N2 and H2 are combined?
N2
Which of the following reactants would you add to an aqueous solution of silver nitrate in order to precipitate quantitatively all the silver?
NaCl
The following reaction:Mg+FeO—>MgO+.... is an example of*?
Single displacement
A mole ratio is the ratio between the number of moles of any 2 species involved in the chemical reaction
True
A mole ratio is used to convert the given number of moles of one substance to the unknown number of moles of a second substance.
True
The limiting reactant in a chemical reaction is the reactant which is completely consumed:
True
The mole is 6.022 • 10^23 particles?
True
products of an acid and base are water and salt:
True
percent yield formula
actual yield/theoretical yield x 100