391 Answered Questions for the topic stoichiometry

Stoichiometry Chemistry

04/02/20

How many grams of oxygen (O2) are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol. 4 KNO3(s) → 2 K2O(s) + 2 N2(g) + 5 O2(g)

Formula: 4 KNO3(s) → 2 K2O(s) + 2 N2(g) + 5 O2(g)
Stoichiometry Science Biology Chemistry

04/02/20

Automotive air bags inflate when sodium azide, NaN3, rapidly decomposed into N2 and Na by the following reaction: 2 NaN3 --> 2 Na + 3 N2. In order to fill an air bag, 75.0 grams of N2 must be formed.

Question: How many grams of NaN3 must react to form 75.0 grams of N2.
Stoichiometry Science Biology Chemistry

04/02/20

How many grams of Li3N can be formed from 12.1 grams of Li? Assume an excess of nitrogen (N2). 6 Li(s) + N2(g) → 2 Li3N(s)

Formula: 6 Li(s) + N2(g) → 2 Li3N(s)
Stoichiometry

03/28/20

Stoichiometry

03/27/20

how many grams of oxygen does it take to produce 9.60 grams of carbon dioxide

Stoichiometry Chemistry

03/23/20

How many carbon dioxide (CO2) molecules are produced during the decomposition of 1.25 moles of Carbonic acid (H2CO3)

Stoichiometry Chemistry

03/23/20

How many grams of MgCl2 will be produced from 16.0 g of Mg(OH)2 and 11.0 g of HCL?

Stoichiometry Chemistry

03/10/20

If we react 5.00 moles of Na with 5.00 miles of H2O, how many L of H2 gas will be produced?

Using balanced equation: 2Na+H2O=Na2O+H2a. If we react 5.00 moles of Na with 5.00 moles of H2O, how many L of H2 gas will be produced?b. What is the limiting reagent?c. How many g of excess reagent... more
Stoichiometry Chemistry

03/08/20

Chemistry question

Copper can be recovered from scrap metal by adding sulfuric acid. Soluble copper sulfate is formed. The copper sulfate then reacts with metallic iron in a single displacement reaction. A student... more
Stoichiometry Chemistry

03/05/20

If you wanted to make 8.3 x 10^23 molecules of ammonia, how many molecules of starting material would you need of each reactant. H2 and N2

Stoichiometry Chemistry

02/23/20

Calculate the mass of copper needed to react with excess chlorine gas to produce 84g of copper(II) chloride--write a balanced equation first.

I'm having trouble with Stoichiometry, specifically problems like these. I've never had a problem before where the only number given to me is what is produced, so I'm not sure on how to set this up... more
Stoichiometry Chemistry

02/21/20

How many grams of NH3 can be produced from 3.63 mol of N2 and excess H2.

3H2(g)+N2(g)→2NH3(g)How many grams of NH3 can be produced from 3.63 mol of N2 and excess H2.How many grams of  are needed to produce 13.43 of NH3 ?How many molecules (not moles) of NH3 are produced... more
Stoichiometry Chemistry

02/07/20

Stoichiometry

02/02/20

Stoichiometry

01/14/20

Need help! Standard enthalpy change for balanced reactions

Decomposition of hydrogen peroxide is exothermic with (change in enthalpy= 192kj). Im asking for help on how to calculate how much heat energy will be released when 3.5 grams of Hydrogen peroxide... more

12/17/19

Chemistry Honors Help? (stoichiometry)

7) How many moles of nitric oxide, NO, are formed when 1.2 mol of nitrogen dioxide, NO2, reacts with excess water?3NO2 (g) + H2O (l) --> 2HNO3 (aq) + NO (g)82) If 60 grams of NO and 60 grams of... more
Stoichiometry

11/17/19

Calculate the mass of water produced. Show your work. [H = 1.008, O = 16.00]

- When ethene, C2H4 (g), is completely combusted, carbon dioxide, CO2(g), and water vapor, H2O(g), are produced according to the following balanced equation: C2H4 (g) + 3 O2 (g) → 2 CO2 (g) + 2... more
Stoichiometry Chemistry

11/17/19

Calculate the volume of ethene reacted. Show your work.

When ethene, C2H4 (g), is completely combusted, carbon dioxide, CO2(g), and water vapor, H2O(g), are produced according to the following balanced equation: C2H4 (g) + 3 O2 (g) → 2 CO2 (g) + 2... more
Stoichiometry

11/17/19

Calculate the volume of oxygen needed for complete combustion of ethene. Show your work.

When ethene, C2H4 (g), is completely combusted, carbon dioxide, CO2(g), and water vapor, H2O(g), are produced according to the following balanced equation: C2H4 (g) + 3 O2 (g) → 2 CO2 (g) + 2... more
Stoichiometry Chemistry

11/17/19

If 1.4 L of nitrogen reacted, calculate the volume of hydrogen gas needed to react. Show your work.

ogen gas reacts with hydrogen gas to form ammonia according to the equation: N2 (g) + 3 H2 (g) → 2 NH3 (g)
Stoichiometry Chemistry

11/15/19

Sodium oxalate and Potassium Permanganate reaction stoichiometry

An impure sample of sodium oxalate weighing 1.557 g required 27.59 mL of 0.0978 M potassium permanganate for complete reaction according to the following reaction:5Na2C2O4 + 2KMnO4 + 8H2SO4 =... more
Stoichiometry Chemistry

11/06/19

Stoichiometry, Chemistry

How many moles of NH3 can be produced from 12.0 mol of H2 and excess N2?

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