Which of the following determines the identity of an element?

A) atomic number

B) mass number

C) atomic mass

D) overall charge

When a wave moves, what happens to the medium? A it moves forward with the wave B it moves only perpendicular to the energy of the wave C it moves up and down or back and forth, but it does not move forward with the wave D it moves only parallel to

14. A neutron has a charge of (1) + 1 (2) + 2 (3) O (4) - 1

Many factors influence the composition of Earth's atmosphere. Identify the correct statements about Earth's atmosphere. Click to select the correct answers.

What is the molarity of a solution that contains 14.92 grams magnesium oxide (MgO) in 365ml of solution? a. 1.01 molar solution b. 1.52 molar solution c. 11.2 molar solution d. 87.2 molar solution

Given an acidic solution with a pH of 4.5, what is pOH of the same solution? A) 0 B) 7 C) 9.5 D) 14

What must be true for a substance to be able to dissolve in water? a) the solute particles must have a strong attraction for the water particles b) the solute must be able to react with water at the given temperature c) there must be enough energy

Drag the appropriate elements to their respective bins

Compare how an increase in wavelength affects sounds and light waves.

The addition of an acid to water increases the [H30*) of the solution and increases the solution pH. True or False True False

31.65 mL volume of 1.07 M Fe (NO3) 3 is mixed with 44.96 mL of 0.79M Fe (NO3) 3 solution. Calculate the molar concentration of the final solution. Save rounding until the end.