What is nearly all of an atom's mass made up of?

protons and neutrons

the cloud of protons

neutrons and electrons

the cloud of electrons

1) the attraction forces between mercury atoms in liquid mercury are stronger than the Intermolecular forces between water molecules.

2) Compound A is neutral and Compound B is acidic. Both are water-insoluble solids. A and B are dissolved in dichloromethane (DCM) and extracted with aqueous base. The layers are then separated.

Select the correct answer. What does the law of conservation of energy state? O A. Energy can be created from nothing. OB. Energy cannot be destroyed. C. Energy cannot change forms. D. The total amount of energy in a system changes continuously.

Which of the following ions is an oxyanion? 1. F - 2. SO42 - 3. NH4 + 4. SCN-

What is the mole ratio of Cl2 to Br2 in the given reaction? Cl2 + 2NaBr → 2NaCl + Br2

If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what would happen to the pressure of the gas? It would increase. It would be halved. It would stay the same.

Which of the following would require the largest volume of 0.100 M sodium hydroxide solution for neutralization?: (A) 20.0 mL of 0.0500 M nitric acid (B) 15.0 mL of 0.0500 M hydrobromic acid (C) 5.0 mL of 0.0100 M sulfuric acid (D) 10.0 mL of 0.

Approximately what volume do 3.0 moles of kr gas occupy at stp? 80.0 40.0 l none of the above 20.0

What is the correct formula when Aluminum and Nitrogen are combined? a. Al3N b. AlN c. AlN3 d. Al2N

1-Bromobutane reacts with water to form 1-butanol according to the following equation. C4H9Br (aq) + 2 H2O (l) → C4H9OH (aq) + H3O + (aq) + Br - (aq) The following is a proposed mechanism for the reaction.