When calcium carbonate is heated, it breaks down into calcium oxide and carbon dioxide. CaCO3(s) ➡️ CaO(s) + CO2 (g)
You heat 2.0 moles CaCO3.
How many moles of carbon dioxide(CO2) will you make?

Options:

A) 2 moles CO2

B) 0.50 moles CO2

C) 4 moles CO2

D) 1 mole CO2

What is the standard unit of measure for acceleration?

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.

Achemical reaction is done in the setup shown, resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?