Answer:
B.
Explanation:
Si is an element.
A compound is 2 different elements combined. H2O and NaCl fit this requirement, so they are compounds. They cannot be elements because they are not single elements like Si.
it's mixture
i did it on study island
125.4 kilopascals
wkdje
1 mole of NH3 has 6.023×10^23 molecules.
Desk
Water
Cloud
Helium
