How many molecules in 45 grams of BaS?

What is a good way to remember the igneous, metamorphic, and sedimentary rock. what "nicknames" could you use?

According to Bohr's model, what can be said of the amount of energy that an electron absorbs when it is excited compared to the amount of energy that it releases when it returns to ground state? A.

Does gravity affect the orbit of the international space

How much more basic is a solution with pH 10 than a solution with pH 8? A. 2 times B. 6 times C. 10 times D. 100 times

Which layer of the atmosphere contains a substance that was created from a product of living things and that protects living things? A) Ionopause B) Ozone C) Stratosphere D) Exosphere

Hydrogen has three isotopes with mass numbers of 1, 2, and 3 and has an average atomic mass of 1.00794 amu. This information indicates that 1. equal numbers of each isotope are present 2. more isotopes have an atomic mass of 2 or 3 than of 1 3.

Describe the process of how visible light is produced

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