# CHEM 1A

Balanced equation,
4KNO3(s) ----->2K2O(s) + 2N2(g) + 5O2(g)
To produce 51.8kg of O2,
How many moles of KNO3 must be heated?

How many grams of KNO3 must be heated?

Do you calculate like KNO3 and O2 is just one mole or do you divide 4/5 at the end of the equation?

51.8kgO2 x 1000g/1kg = 51800g O2 / 32.00g O2 = 1618.75g x 4/5 = 1295 moles KNO3...Is this correct?

1. 👍 0
2. 👎 0
3. 👁 385
1. On the right track but not quite right. You may have just mislabeled your numbers.
51,800 g O2 is what you want.
mols O2 = 51,800/32 = 1618.7 MOLES O2 (not grams) needed. Convert that to mols KNO3 by multiplying by 4/5 = 1295 mols KNO3 and you have that labeled right.

Then grams KNO3 = mols KNO3 x molar mass KNO3.

1. 👍 0
2. 👎 0
posted by DrBob222
2. Sweet, Thank you....

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemistry

Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)--> 2K2O(s) + 2N2(g) + 5O2(g) To produce 56.6 kg of oxygen, how many (a) moles of KNO3 must be heated? (b) Grams of KNO3

asked by Telicia on September 29, 2009
2. ### Chemistry

Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)--> 2K2O(s) + 2N2(g) + 5O2(g) To produce 56.6 kg of oxygen, how many (a) moles of KNO3 must be heated? (b) Grams of KNO3

asked by B on June 17, 2012
3. ### Chemistry

Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)--> 2K2O(s) + 2N2(g) + 5O2(g) To produce 56.6 kg of oxygen, how many (a) moles of KNO3 must be heated? (b) Grams of KNO3

asked by Telicia on September 27, 2009
4. ### chemistry, stoichiometry

Consider the Balanced Chemical Equation 2N2+6H20-->4NH3+3O2 How many moles would be needed to react fully with 0.225 moles of N2?

asked by Katie on April 30, 2013
5. ### science

from the balanced equation 4NH3 +7O2 - 4NO2 + 6H2O. How many grams of oxygen are necessary to produce 4.50 moles of NO2? I think its 11 grams or 22 grams but im not sure. please help!! First the number of moles of O2, molesO2=

asked by Britney on March 18, 2007
6. ### Chemistry

Balance the photosynthesis equation: CO2+ H2O-> C6H12O6+ O2 Which i think this is Balanced: 6CO2 + 6H2O + energy-> C6H12O6 + 6O2 ? The question is this: According to the balanced equation __________ moles of carbon dioxide will

asked by Lyssa on February 4, 2012
7. ### Chemistry

Balance the photosynthesis equation: CO2+ H2O-> C6H12O6+ O2 Which i think this is Balanced: 6CO2 + 6H2O + energy-> C6H12O6 + 6O2 ? The question is this: According to the balanced equation __________ moles of carbon dioxide will

asked by Lyssa on February 4, 2012
8. ### Chemistry

given the balanced equation representing a reaction: 4NH3+5O2-->4NO+6H2O what is the minimum number of moles of O2 that are needed to completely react with 16 moles of NH3? (1)16 mol (2)20.mol (3)64 mol (4)80. mol i think its 2

asked by Destinee on January 2, 2011
9. ### college chemistry

how many L @STP if oxygen are needed to produce 45.0 grams of nitric oxide according to the following balanced chemical equation? 4NH3 + 5O2=4NO + 6H2O

asked by Lilly on October 13, 2016
10. ### chemistry

A researcher put 10.0 moles of N2O into a 2-L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction. How am I

asked by Laury on April 6, 2017

More Similar Questions