Answer: CaCl2
Explanation: the combining power will cross each other giving 1 as the subscript of calcium and 2 as the subscript of chlorine.
A substance that can be used or prepared for use as food
It would be A
First is: DNA > mRNA (messenger RNA) > tRNA (transfer RNA) > protein
Answer:
Peanut butter
All single carbon-to-carbon bonds
Sunflower oil
At least one double carbon-to-carbon bond
Cheddar cheese
All single carbon-to-carbon bonds
Explanation: I did it on Edge 2020 and it was correct.