# How to use STP in chemistry?

When barium carbonate is heated strongly, carbon dioxide gas evolved. IF 12.55G of Barium carbonate is heated, what volume of CO2(g) would be produced when collected at STP?

BaCO3(s) --> BaO(s) + CO2(g)

How would I do this problem?

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• Anonymous

Use the ideal gas law. STP means 0oC (273 K), 1 atm P but first you have to do some stoichiometry calculations as follows:

Convert grams of BaCO3 to moles of BaCO3. From the balanced equation, we see that for every one mole of BaCO3 we get 1 mole of CO2. So, the number of moles CO2 = the number of moles of BaCO3.

Now you know the number of moles, the P, the T and can solve for volume using the ideal gas law.

Hope that helps.

If you have 1 mole of Barium Carbonate which its molecular weight is 197.35 heated strongly then barium oxide which has a molecular weight of 153.33 or 1 mole should yield 1 mole of Carbon dioxide with a molecular weight of 44.00.

The Ideal Gas Law is PV=nRT

P=Pressure in atmospheres

V=Volume in liters

n=moles of gas

R=Ideal Gas Constant

T=Temperature in Kelvin.

If you need further help I can calculate it for you.

• kukwa
Lv 4
4 years ago

How To Use Stp