What must an object gain or lose to become electrically charged? (Choose the best answer)

protons

electrons

neutrons

nucleus

The brackets used to express concentration [ ], when making equilibrium constant calculations, indicate

Given the information for reaction 1 at a specific temperature; calculate kc for reaction 2 at the same temperature. reaction 1: 2ch4 (g) ⇄ c2h2 (g) + 3h2 (g) kc = 0.020 reaction 2: 2c2h2 (g) + 6h2 (g) ⇄ 4ch4 (g)

A driver realizes that she is traveling in the wrong direction on a one-way street. She has already driven 3.5 meters at a velocity of 16 meters per second, cast before deciding to make a U-turn.

Alpha radiation: A. is not harmful as it is not able to penetrate human skin B. can be harmful to humans if the materials are inhaled, swallowed, or absorbed through open wounds C. can travel long distances through air D.

what is molarity of a sodium hydroxide solution made by combining 2.0 L of 0.60 M NaOH with 495 mL of 3.0 M NaOH? Assume the volumes of the two solutions to be additive

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density

How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12) ?