Multiple Choice
A 0.846-g sample containing barium ions is completely dissolved in water and treated with excess Na2SO4. 0.746 g of BaSO4 precipitates. What is the mass percent of barium in the sample?
3. Chemical Reactions
Stoichiometry
Back3. Chemical Reactions
Stoichiometry
- Multiple ChoiceCalculate how many moles of N₂ are produced when 2.4 mol of N₂H₄ completely react according to the balanced equation: 3 N₂H₄ → 4 NH₃ + 2 N₂.
- Multiple ChoiceConsider the following reaction: 2 Mg + O2 → 2 MgO. What mass (g) of MgO can be created from 4.3 g of O2 and excess Mg?
- Multiple ChoiceHow many grams of silver chromate (Ag2CrO4) will precipitate when 150 mL of 0.5 M silver nitrate (AgNO3) is added to 100 mL of 0.4 M potassium chromate (K2CrO4)?
- Open QuestionStoichiometry is based on the law of
- Multiple ChoiceIn a stoichiometric reaction, if the volume of the reaction vessel is 1.50 L and the rate of formation of Br2 is 0.020 mol/L·s, what amount of Br2 (in moles) is formed during the first 15.0 seconds of the reaction?
- Multiple ChoiceThe reaction of 50 mL of Cl2 gas with 50 mL of C2H4 gas via the equation: Cl2 (g) + C2H4 (g) → C2H4Cl2 (g) will produce a total of ________ mL of products if pressure and temperature are kept constant.
- Open QuestionWhat mass of h2 would be produced by the complete reaction of the iron bar?
- Multiple ChoiceHow many grams of chlorine gas (Cl2) are needed to react completely with sodium to produce 117 grams of sodium chloride (NaCl)?
- Multiple ChoiceUsing the equation 4NH3 + 5O2 → 4NO + 6H2O, what mass of ammonia (NH3) is needed to react with oxygen to form 25 g of water (H2O)?
- Multiple ChoiceConsider the following balanced reaction. How many grams of water are required to form 75.9 g of HNO3? Assume that there is excess NO2 present. The molar masses are as follows: H2O = 18.02 g/mol, HNO3 = 63.02 g/mol.3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)
- Multiple ChoiceIf you have 3.2 grams of Zn, how many liters of H2 gas could be produced in the following chemical reaction at STP? Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)
- Multiple Choice
Determine the density of 50.0 mL iron (II) bromide when the following chemical reaction produced 112.7 g iron (II) phosphate.
2 K3PO4 (aq) + 3 FeBr2 (aq) → Fe3(PO4)2 (s) + 6 KBr (aq)
3views1rank - Open Question
What mass of NaCl can be produced by the reaction of 5.0 mol Cl2? 2 Na + Cl2 --> 2 NaCl
- Multiple ChoiceHow many grams of chlorine gas (Cl2) can be produced from the decomposition of 73.4 g of AuCl3 according to the reaction: 2AuCl3 → 2Au + 3Cl2?