Stoich #1 Academic Chem
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Last updated almost 3 years ago
8 questions
Required
1
How many grams of O2 are needed to produce 2.21 g NO2? Show all work and units.2 NO (g) + O2 (g) → 2 NO2 (g)
How many grams of O2 are needed to produce 2.21 g NO2? Show all work and units.
2 NO (g) + O2 (g) → 2 NO2 (g)
Required
1
In the reaction between calcium carbonate and hydrochloric acid, carbon dioxide is made. How many grams of calcium carbonate would be needed to react completely with 15.0 grams of hydrochloric acid? Show all work and units.CaCO3 + 2 HCl --> CaCl2 + H2O + CO2
In the reaction between calcium carbonate and hydrochloric acid, carbon dioxide is made. How many grams of calcium carbonate would be needed to react completely with 15.0 grams of hydrochloric acid? Show all work and units.
CaCO3 + 2 HCl --> CaCl2 + H2O + CO2
Required
1
Calcium phosphate, silicon dioxide, and coke (C) may be heated together in an electric furnace to produce phosphorus, as shown in the following equation: 2 Ca3(PO4)2 + 6 SiO2 + 10 C --> 6 CaSiO3 + 10 CO + P4In the reaction, how many grams of calcium phosphate would be needed to make 100. grams of phosphorus? Show all work and units.
Calcium phosphate, silicon dioxide, and coke (C) may be heated together in an electric furnace to produce phosphorus, as shown in the following equation:
2 Ca3(PO4)2 + 6 SiO2 + 10 C --> 6 CaSiO3 + 10 CO + P4
In the reaction, how many grams of calcium phosphate would be needed to make 100. grams of phosphorus? Show all work and units.
Required
1
Calcium oxide can be prepared by heating calcium in oxygen. How much calcium would be needed to make 15.0 grams of calcium oxide in this way? Show all work and units.
Calcium oxide can be prepared by heating calcium in oxygen. How much calcium would be needed to make 15.0 grams of calcium oxide in this way? Show all work and units.
Required
1
Permanent hard water contains calcium sulfate and can be softened by the addition of sodium carbonate. What amount of sodium carbonate would have to be added to react with 150. grams of calcium sulfate? Show all work and units.
Permanent hard water contains calcium sulfate and can be softened by the addition of sodium carbonate. What amount of sodium carbonate would have to be added to react with 150. grams of calcium sulfate? Show all work and units.
Required
1
An airbag is a safety feature inside a vehicle that would reduce the impact of the collision on drivers and passengers in an accident. During the collision, the electric circuit passes an electrical current through a carefully measured amount of sodium azide (NaN3) to initiate its decomposition: NaN3 (s) → 3 N2 (g) + 2 Na (s). N2 gas then fills the bag providing a cushion for impact.If 45.0 grams of NaN3 were to decompose, how many liters of N2 gas would be produced? Show all work and units. (22.4 L/mol)
An airbag is a safety feature inside a vehicle that would reduce the impact of the collision on drivers and passengers in an accident. During the collision, the electric circuit passes an electrical current through a carefully measured amount of sodium azide (NaN3) to initiate its decomposition: NaN3 (s) → 3 N2 (g) + 2 Na (s). N2 gas then fills the bag providing a cushion for impact.
If 45.0 grams of NaN3 were to decompose, how many liters of N2 gas would be produced? Show all work and units. (22.4 L/mol)
Required
1
In nature, carbon dioxide in the atmosphere reacts with calcium hydroxide to produce calcium carbonate. If 25.0 grams of calcium hydroxide is reacted with excess carbon dioxide, how much calcium carbonate should be produced? Show all work and units.
In nature, carbon dioxide in the atmosphere reacts with calcium hydroxide to produce calcium carbonate. If 25.0 grams of calcium hydroxide is reacted with excess carbon dioxide, how much calcium carbonate should be produced? Show all work and units.
Required
1
How much silver bromide can be precipitated by the reaction of 15.0 g of silver nitrate with an excess of sodium bromide? Show all work and units.
How much silver bromide can be precipitated by the reaction of 15.0 g of silver nitrate with an excess of sodium bromide? Show all work and units.