Answer:
this reaction is an oxidation reaction
Answer:
2.1 x 10¹²ng
Explanation:
Mass of the calcium carbonate given is:
2.1kg
We need to take this mass to nanogram, ng.
Since :
1000g = 1kg
10⁹g = 1ng
So;
1kg = 1000 x 10⁹ = 10¹²ng
So;
2.1kg will give;
Since
1kg gives 10¹²ng
2.1kg will give 2.1 x 10¹²ng
There are two that seem correct to me but i would go with the first answer choice, a mole of cu atoms has the same number or atoms as a mole of he atoms.
No because carbon is a gas and sand is a solid
number 2 is community sense lions ain't everywhere I not sure tho
