Which one of the following is an element?

salt water.

sugar

oxygen

chocolate chip cookies

If 4 moles of gas are added to a container that already holds one mole of

Increasing the intensity and duration of an exercise program too quickly can lead to injury.

Select all the true statements regarding chemical equilibrium. At equilibrium ... A. the concentrations of reactants and products are equal. B. the concentrations of reactants and products remain constant. C.

Determine the volume of 0.150 M NaOH solution required to neutralize 145 mL of a 0.25 M HCl solution. The neutralization reaction is NaOH (aq) + HCl (aq) → H 2 O (l) + NaCl (aq)

What compound has the ability to absorb large amounts of heat without itself increasing dramatically in temperature

The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H + ions; that is, ΔH° [H f ⁺ (aq) ] = 0. (a) For the following reaction HCl (g) ⟶H₂O H⁺ (aq) + Cl⁻ (aq) ΔH° = - 74.

Heat is the total potential energy of a substance that can be transferred. TRUE FALSE

How does Earth's rotation axis cause seasons to change?

Which of the following can be considered evidence of a chemical change? (Click the 4 that apply) A. Evaportation B. Production of a new substance C. Production of Bubbles D. Melting E. Color change F. Dissolving G. Freezing H. Heat is released

The decomposition of hi has a rate constant of 1.80 * 10-3 m-1s-1. how much hi remains after 8.50 min if the initial concentration of hi is 4.78 m?