Answer: 40.1%
Explanation: The mass of calcium in this compound is equal to 40.1 grams because there's one atom of calcium present and calcium has an atomic mass of 40.1 . The molar mass of the compound is 100.1 grams. Using the handy equation above, we get: Mass percent = 40.1 g Ca⁄100.1 g CaCO3 × 100% = 40.1% Ca.
Answer:
(not sure if this helps but)
The number of electrons in a neutral atom is equal to its proton.
Explanation:
The number of protons in a neutral atom are equal to its number of protons. It is also equal to its atomic number.
hope it helps :)
Answer:
c
Explanation:
because that one will always be different from the others