Question

Ca(ClO3)2→ CaCl2 + O2

What mass of O2 results from the decomposition of 17.00 g of calcium chlorate? _________


Can someone show the work and the answer

Answer 1

7.88 grams is the mass of oxygen gas results from the decomposition of 17.00 g of calcium chlorate.

Step-by-step explanation:

Data given:

mass of calcium chlorate = 17 grams

atomic mass of calcium chlorate = 206.98 grams/mole

mass of oxygen formed =?

atomic mass of oxygen gas = 32 grams/mole

balance chemical reaction:

Ca(Cl
`O_(3)`)
`_(2)` ⇒
`CaCl_(2)` + 3
`O_(2)`

Number of moles =
`(mass)/(atomic mass of 1 mole)`

putting the values in the equation:

number of moles =
`(17)/(206.98)`

number of moles of calcium chlorate = 0.0821 moles

1 mole of calcium chlorate decomposes to release 3 mole of oxygen

0.0821 moles will release x moles of oxygen gas

`(3)/(1)`=
`(x)/(0.0821)`

x = 0.246 moles

mass = atomic mass x number of moles

mass = 0.246 x 32

mass = 7.88

7.88 grams of oxygen produced from decomposition of 17 grams calcium chlorate