When an atom receives or takes on electrons it becomes this? proton, electron, electric charge, attract, repel, positive ion, negative ion

At standard pressure which substance becomes less soluble as temperature increases from 10. °c to 80.°c

Foam cup A has 36 mL of water that contains 2 moles of HCl at 20 degrees Celsius. Foam cup B has 36 mL of water that contains 2 moles of NaOH at 20 degrees Celsius. The contents of foam cup A are added to foam cup B and a chemical reaction occurs.

Does a physical change occur more often than a chemical change?

What are 3 ways that atoms can become more chemically stable

The buoyancy force on a floating object is: (select all that apply) • equal to the volume of the object •greater than the weight of the object •less than the weight of the object •equal to the weight of the water displaced

What is in a banana? give me specifics?!

Addition of an excess of lead (II) nitrate to a 50.0mL solution of magnesium chloride caused a formation of 7.35g of lead (II) chloride precipitate. What was the molar concentration of chloride ions in the solution (in mol/L) ?

2.70 L of a gas has a pressure of 0.63 atm. What is the volume of the gas at 105 kPa?

Which statements describe Rutherford's model of the atom? Select all that apply.

When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. what volume of h2 is produced when 7.20 g of al reacts at stp?