Which statement is true about energy changes?

A. Energy can be created but not destroyed.

B. Energy can be created and destroyed.

C. Energy can be destroyed but not created.

D. Energy cannot be created or destroyed.

Given the following reaction: H2SO4 + 2LiOH - -> Li2SO4 + 2H2O What mass of water is produced from 19 g of sulfuric acid? Question options: 1.0 7.0 2.0 6.3

A solution contains 10.0 g pentane, C5H12, 20.0 g hexane, C6H14, and 10.0 g benzene, C6H6. What is the mole fraction of hexane? A) 0.303 B) 0.471 C) 0.433 D) 0.362 E) 0.335

Which are different forms of an element that have different numbers of neutrons? ions isotopes compounds molecules

When energy is transferred from the air to the water, what happens to most of the energy? A. It travels through the water. B. It moves the water forward C. It refracts off the surface of the water D. It causes the water to condense.

As you sit on a dock, you notice a wave crest pass. You count another 10 wave crests in the next 15 seconds. What is the frequency of these waves? A. 10 Hz B. 15 HZ C. 0.667 Hz D. 1.5 Hz

Which best describes the process of igneous rock formation?

Describe how crust forming on the surface of lava illustrates the principle that removing heat from a system may result in a change in state.

Study the ion that contain the element chlorine. What are some similarities between the formulas for these ions

What is the density of a marble that has a mass of 3.023 g and displaces 2.5 mL of water?

What are the two main systems we use for describing acids and bases?