1. Potassium nitrate when exposed to heat decomposes to potassium oxide and gaseous nitrogen and oxygen: 4KNO,(s) → 2K,0(s) + 2N,(g) + 50,(g) To produce 28.3 g of oxygen, how many (a) moles of KNO, and (b) grams of KNO, must be heated? 3.

1. Potassium nitrate when exposed to heat decomposes to potassium oxide and gaseous nitrogen and oxygen: 4KNO,(s) → 2K,0(s) + 2N,(g) + 50,(g) To produce 28.3 g of oxygen, how many (a) moles of KNO, and (b) grams of KNO, must be heated? 3.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 139QRT

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

Hi tutors, can I have a request to answer this all without me separating those questions, coz I'm saving my post question/ask an expert for my other questions. hope u understand thank you.

Show your solution to the correct number of significant figures. Use your own
periodic table to solve for molar mass.
1. Potassium nitrate when exposed to heat decomposes to potassium oxide
and gaseous nitrogen and oxygen:
4KNO,(s) → 2K,0(s) + 2N,(g) + 50,(g)
To produce 28.3 g of oxygen, how many (a) moles of KNO, and (b) grams
of KNO, must be heated?
2. Striking a match stick on the matchbox involves the reaction of potassium
chlorate and red phosphorus with the following equation:
10 KCIO, (s) + 3P, (s)→3P,0,, (s) + 10 KCI (s).
How much of each reactant will be needed to produce 105.8 g of
tetraphosphorus decaoxide (P,0,0)?
3. What mass (in grams) of fluorine gas is needed to react completely with
17.8 g of elemental sulfur, S, to form sulfur hexafluoride SF?
S, (g) + 24F, (g)→8 SF, (g)
2

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