Select the particle(s) that account for 99.99% of the mass of atoms other than hydrogen.

When iron rusts it undergoes a chemical reaction and becomes iron oxide. Select the number of electrons gained or lost by every oxygen atom that is converted into the new compound.

Carl has a Ziploc bag that contains 10 g of water. He drops 2 seltzer tablets in the bag and closes the bag quickly. If each seltzer tablet has a mass of 2.5 g, what is the mass of the bag and it's remains at the end of the experiment?

Select the change that will decrease the rate at which a solid solute dissolves in liquid solvent.

As water changes phases from liquid to gas, what is expected to happen?

Name the process the following statement describes: A wet sidewalk begins to steam in the sun after a spring shower on a warm, sunny day.

Describe the conversion of energy in the following process: Nuclear power reactors utilize the process of uranium fission to produce heat.

Which of the following elements has the fewest electrons?

Marla has three balls. Ball A has a mass of 19 g. Ball B has a mass of 1 kilogram. Ball C has a mass of 300 g. In the absence of air resistance, which ball will accelerate the fastest to the ground?

An example of using a lever is

Seawater contains sodium chloride and other dissolved salts. Identify the term that correctly describes those dissolved salts.

Identify the voltage needed to establish a current of .25 A in a circuit with a total resistance of 10 ohms.

ROYGBIV describes the visible light portion of the electromagnetic spectrum, with red light (R) at one end and violet light (V) at the other. Which of the following statements is true?

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