Balance the following equation:
_ FeO + _ PdF2 → _ FeF2 + _ PdO
1 FeO + 1 PdF2 → 1 FeF2 + 1 PdO
Already balanced
What is the molar mass of oxygen?
15.999g
Determine the number atoms of 65.38 grams of Zinc.
6.022*1023 atoms
What is the formula for percent composition?
part/whole
What is the difference between empirical and molecular formula?
Empirical formula: simplest whole number ratio
Molecular formula: (empirical)n
Balance the following:
_ Al + _ O2 → _ Al2O3
4 Al + 3 O2 → 2 Al2O3
What is the molar mass of CO2?
44.01g
How many moles are in 1.2*103 grams of ammonia, NH3?
70.5 moles
What is the percent composition of carbon in C16H15O4?
C: 70.83%
An oxide of chromium is found to have the following % compositions: 68.4% Cr and 31.6% O. Determine empirical formula.
Empirical: Cr2O3
Balance the following:
_ HClO4 + _ P4O10 → _ H3PO4 + _ Cl2O7
12 HClO4 + P4O10 → 4 H3PO4 + 6 Cl2O7
What is the molar mass of sodium hydroxide?
39.997g/mol
How many atoms are there in 122 grams of Cu(NO3)2?
3.92*1023 atoms Cu(NO3)2
What is the percent composition of each element in HCl?
H: 3%
Cl: 97%
The molar mass of nicotine is 162.1g/mol. It contains 74% of Carbon, 8.7% of Hydrogen, and 17.3% of Nitrogen. Determine the empirical formula and then using the empirical, find the molecular formula.
Empirical Formula: C5H7N
Molecular Formula: C10H14N2
Balance the following:
_ PCl5 + _ H2O → _H3PO4 + _ HCl
PCl5 + 4 H2O → H3PO4 + 5 HCl
What is the molar mass of HSO4?
97.064 g/mol
How many grams are there in 7.5*1023 atoms of H2SO4?
122.19 grams
What is the percent composition of copper (II) bromide?
Cu: 28.45%
Br: 71.55%
A compound with 5.9265% H and 94.0735% O has a molar mass of 34.01468 g/mol. Determine the empirical and molecular formula of this compound
E: HO
M: H2O2
Balance the following:
_ Cu + _ HNO3 → _ Cu(NO3)2 + _ NO + _ H2O
3 Cu + 8 HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O
What is the molar mass of Pb(Cr2O7)2?
639.2g/mol
How many atoms of Oxygen are present in 25 grams of CO?
5.37*1023atomsO
What is the percent composition of each element in (NH4)3PO4?
N: 28%
H: 8%
O: 43%
P: 21%
The composition of Phenyl magnesium bromide contains 39.7458% of Carbon, 2.77956% of Hydrogen, 13.4050% of Magnesium, and 44.0697% of Bromide. The molar mass is 181.313g/mol. Determine the empirical formula, and then using the empirical formula, what is the molecular formula?
E: C6H5MgBr
M: C6H5MgBr