Which of the following statements is true?

Evaporation is the main way water enters the atmosphere.

Condensation is the opposite of evaporation.

The total amount of water on the earth stays the same.

all of the above

Why are atomic masses on the Periodic Table written in decimals when they are based on mass numbers that can be whole numbers?

The atomic number of chlorine is 17. the atomic number of magnesium is 12. what is the formula for magnesium chloride?

What is the theoretical yield of H2O if 130 g of H2O is produced from 18 g of H2 and an excess of O2?

What is the smallest type of pyroclastic material

Write a balanced equation for the decomposition of tnt. assume that, upon explosion, tnt decomposes into n2 (g), co2 (g), h2o (g), and c (s) :

Which of the following contains both ionic and covalent bonding? CH4 NaCl NH4Cl N2O4 If the formula for a compound is represented by X2Y3 and the charge on the Y ion is - 2, what is the charge in the X ion? +1 +2 +3 +4

Qual e o maior orgao do corpo humano

Whic of the following fromulas represents a nonpolar molecule? a) N2 b) H2O c) NaCI d) HCI

What is the density of 19.2 g of oak that has a volume of 25.7 cm3?

Which of these is a compound? О co2, O2, Co