D= mass/volume so it's 100/68 which equals 1.47cm3
If you have a magnesium for every oxygen, then you have to start with two magnesiums. So the balanced equation is 2 Mg + O2 2 MgO.
And
CaCO3———→CaO + CO2
I hope it helped!
Answer:
Explanation:
Attach is the net ionic equation
When Use a beaker you measure in ml.
Answer:
There are 12 protons, and 10 electrons in an Mg2+ ion, the normal amount of neutrons is 12.
Explanation: