# Blackboard chalk is a mixture of limestone and gypsum.A piece of blackboard chalk weighing 5.42g was immersed in HCl,the CO2 produced weighed 1.11g.What is the percentage of limestone in the chalk?Thank you

##### 1 Answer

Write your answer here...

Start with a one sentence answer

Then teach the underlying concepts

Don't copy without citing sources

preview

?

#### Answer

Write a one sentence answer...

#### Answer:

#### Explanation

Explain in detail...

#### Explanation:

I want someone to double check my answer

Andrea B.
Share

Oct 18, 2017

#### Answer:

46,5%

#### Explanation:

You must write the balanced reaction:

That means that from 1 mol of

To found the % we have

Was this helpful? Let the contributor know!

Describe your changes (optional) 200