Question

How many molecules of CO2 are left when from 400mg CO2,10²¹ molecule of CO2 removed?

Answer 1

Answer:

Brainly.in

What is your question?

Secondary SchoolMath 13+7 pts

From 200 mg of co2 10^21 molecules are removed how many moles of co2 are left

Report by Shanayap489 29.07.2017

Answers

The Brain

ABHIMAyu1 · Helping Hand

Know the answer? Add it here!

abhi178

Abhi178 The Sage

First of all we have to find out number of molecules present in 200mg of CO₂.

Given,

weight of CO₂ = 200mg = 200 × 10⁻³ g = 0.2g

molecular weight of CO₂ = 44g/mol

∴number of mole of CO₂ = 0.2/44

Now, number of molecules = number of moles × 6.023 × 10²³

= 0.2/44 × 6.023 × 10²³

= 0.027 × 10²³

= 2.7 × 10²¹

A/C to question,

10²¹ molecule are removed from 2.7 × 10²¹ molecules of CO₂.

so, number of molecules are left = (2.7 -1) × 10²¹ = 1.7 × 10²¹

∵ mole = number of molecules/6.023 × 10²³

= 1.7/6.023 × 10²¹⁻²³

= 0.28 × 10⁻² = 0.0028 ( thank q keep Smiling)