Question

When heated, KClO3 decomposes into KCl and O2.If this reaction produced 43.8 g of KCl, how much O2 was produced (in grams)?

Answer #1

2KClO3 ---------------------> 2 KCl + 3O2

245 g 149.1g 96 g

43.8 ?

149.1 g KCl -------------------> 96 g O2

43.8 g KCl ---------------------> x g O2

x = 43.8 x 96 / 149.1

x = 28.2 g

**mass of O2 produced = 28.2 g**

When heated, KClO3, decomposes into KCl and O2, if
this reaction produced 65.0g of KCl, how much O2 was produced in
grams?

You are given 2.674 g of a mixture of KClO3 and KCl. When
heated, the KClO3 decomposes to KCl and O2, 2 KClO3 (s) → 2 KCl (s)
+ 3 O2 (g), and 758 mL of O2 is collected over water at 21 °C. The
total pressure of the gases in the collection flask is 725 torr.
What is the weight percentage of KClO3 in the sample? The formula
weight of KClO3 is 122.55 g/mol. The vapor pressure of water...

Potassium chlorate (KClO3 molar mass 122.5 g/mol) decomposes
into oxygen gas and potassium chloride. When 3.25 grams of
potassium chlorate decomposes at 610 torr and 34*C, what is the
volume of oxygen gas produced? Remember to convert torr to atm and
Celcius to Kelvin. 2 KClO3 --> 3 O2(g) + 2 KCl (s).

If this reaction produced 23.9 g KCl, how many grams of O2 were
produced?

How many grams of KCl(s) are produced from the thermal
decomposition of KClO3(s) which produces 125.0 mL of
O2(g) at 25°C and 1.00 atm pressure according to the
chemical equation shown below?
2 KClO3(s) → 2 KCl(s) + 3 O2(g)?

How many grams of KCl(s) are produced from the thermal
decomposition of KClO3(s) which produces 50.0 mL of O2(g) at 25°C
and 1.00 atm pressure according to the chemical equation shown
below? 2 KClO3(s) → 2 KCl(s) + 3 O2(g)?
0.102 g
0.167 g
0.152 g
0.304 g

mixture of KCL and KCLO3 has a mass of 2.565 grams.
the mixture is heated and the KCLO3. is decomposed. after cooling
it mass is found to be 1.987g. A) calculate the mass of oxygen lost
from the mixture?B) calculate the number moles of O2 lost from the
mixture .C) calculate the number of moles of Kclo3in the orginal
mixture. d) calculate the mass of KClO3 in the orginal mixture. E)
calculate the percentage of KClO3 in the orginal mixture?

Small rocket engines, such as model rockets, contain KClO3 to
provide oxygen for the combustion reaction that fuels the rocket
motor. The relevant reaction for KClO3 is: 2 KClO3(s) → 2 KCl(s) +
3 O2(g). If 141.6 grams of solid KClO3 are burned in one of these
rocket motors, how many liters of gaseous O2 will be produced at
1.18 atm of pressure and 538oC?

a mixture of kclo3 and an inert impurity nacl weighs 1.75gm. it
was heated unit decomposition of the kclo3 was complete. (nacl was
not affected by the heating) after cooling, the mixture weighed
1.11 grams.
a)write a balanced equation for the decomposition reaction.
b) how many grams and moles of O2 were produced in the
decomposition?
c) how many grams and moles of kclo3 were present in the
original mixture?
d)calculate the % kclo3 in the original mixture?

Predict the volume of oxygen that would be produced by the
decomposition of 1.25 g KClO3 according to the reaction
equation:
2 KClO3 (s) 2 KCl (s) + 3 O2 (g)
The oxygen is collected over water at 30 oC at a total pressure of
751 torr; the vapor
pressure of water at 30 oC is 32 torr.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 13 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago