Natural gas and petroleum are mostly alkanes t/f

What is the nuclear charge of an alpha particle?

Strontium has the atomic number of 38 and a mass number of 88 how many neutrons are in one atom of strontium A.) 50 B.) 38 C.) 88 D.) 126

Which of the following is a characteristic typically not used to classify biomes? a. climate b. vegetation c. temperature d. geography

Explain what needs to happen for the box to start moving

Which of these statements best describes the similarity between the two events shown in the diagram? Select one: a. Both may result in eclipses of the sun or moon. b. Both may cause the moon's shadow to fall on Earth. c.

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction

What is the valence of Fluorine

When liquid helium is exposed to room temperature, it forms a gas. Which best explains why this happens? The liquid helium absorbs energy from the air in the room. The particles in the air absorb the energy of the liquid helium.

Why was Bohr's model considered more accurate than Dalton's model?

Select the statements that correctly describe a buffer. 1) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. 2) A buffer is generally made up of a weak acid and its conjugate base.