Which statement describes how electric charges affect each other?

1. positive and negative charges repel

2. two positive charges attract

3. two negative charges attract

4. positive and negative charges attract

Katherine wants to investigate if the time of day a plant is watered affects the growth of the plant. She hypothesizes that a plant watered in the morning will grow faster than a plant watered at other times of the day.

Which of these human activities is most likely to cause an increase in the number of cases of heat exhaustion among humans? A. Increased consumption of beef, which increases methane production B.

How many moles of cl is produced from Al + 3NH4ClO4 → Al2O3 + AlCl3 + 3NO + 6H2O?

How many molecules are in 4.0 mol h20

Name the element found in a water molecule.

Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium. Chemical equation for producing ammonia: N2 + 3H2 ⇌ 2NH3 + energy

How many Joules are equivalent to 75 Calories?

How do you balance nuclear equations?

Ice melting, water boiling, lighting a match, grape juice freezing. Which statement describes evidence of a chemical reaction

How do the relative concentrations of hydronium ions and hydroxide ions compare in acidic solution?