Chemical Formulas
What is the correct formula for silicon dioxide?
SiO2
Balance the chemical equation.
N2 + H2 → NH3
N2 + 3 H2 → 2 NH3
Fe3O4 + 4 CO → 3 Fe + 4 CO2
How many moles of CO are needed to react with 16.5 g of Fe3O4
285 moles CO
What is a limiting reactant?
The reactant that is used up first and prevents more product from being made.
What is the correct formula for magnesium chloride?
MgCl2
K + Cl2 → KCl
2 K + Cl2 → 2 KCl
4 Fe + 3 O2 → 2 Fe2O3
How many moles of Fe2O3 will form from 5.0 moles of Fe?
2.5 moles Fe2O3
4NH3+ 5 O2 → 4 NO + 6 H2O
When 1 mole NH3 and 1 mole of O2 are mixed, what is the limiting reactant?
O2
What is the charge of manganese in MnO2?
+4
F2 + FeBr3 → FeF3 + Br2
3 F2 + 2 FeBr3 → 2 FeF3 + 3 Br2
2 KClO3 → 2 KCl + 3 O2
How many moles of KClO3 must decompose in order to produce 9 moles of oxygen gas?
6 moles KClO3
Balance the equation AND calculate the limiting reagent in H2 + O2 → H2O if 1 mol of hydrogen and 1 mol of oxygen are reacted.
2H2 + O2 → 2H2O
H2 is the limiting reactant
What is the correct formula for potassium chromate?
K2CrO4
C2H6 + O2 → CO2 + H2O
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
2 Na + Cl2 → 2 NaCl
How many grams of NaCl will be produced from 1.25 mol of chlorine gas reacting with sodium?
146 g NaCl
If 4.95 g of ethylene (C2H4) are combusted with 3.25 g of oxygen. What is the limiting reagent?
O2
What is the correct formula for titanium (II) nitrate?
Ti(NO3)2
Predict the product AND balance the equation.
Ca + HNO3 →
Ca + 2 HNO3 → H2 + Ca(NO3)2
Ammonium nitrate decomposes into dinitrogen monoxide gas and water. Determine the mass of water produced if 25.0 g of ammonium nitrate decomposes.
11.3 grams H2O
2 Mg + O2 → 2 MgO
How many grams of MgO can be produced if 7.8 moles of Mg and 4.7 moles of O2 are mixed?
2 Mg + O2 → 2 MgO
Mg is the limiting reactant
314.4 g of MgO