What is a chemical change?

A.) Splitting water into hydrogen and oxygen

B.) Breaking a block of solid ice into smaller pieces

C.) Freezing liquid water

D.) Boiling water

Aaliya knows that sliced apples turn brown when left out in the open air. She also knows that pouring certain liquids on then will keep this from happening. Aaliya thinks that water, ginger ale, or lemon juice may do the trick.

A copper wire (density=8.96g/cm3) has a diameter of 0.25 mm. if a sample of this copper wire has a mass of 22g, how long is the wire?

A flask holds 3.01 x 10^23 molecules of carbon dioxide. The container is holding A) 0.25 moles of carbon dioxide B) 0.50 moles of carbon dioxide C) 0.75 moles of carbon dioxide D) 1.0 moles of carbon dioxide

Identify the compound with the smallest dipole moment in the gas phase. identify the compound with the smallest dipole moment in the gas phase. lif cl2 clf hf

What is the name of the element above? a. hydrogen b. helium c. lithium d. boron

Volcano formation is directly related to plate tectonics. True False

The solubility of nitrogen gas at 25 degrees C and 1 atm is 6.8 x 10^ (-4) mol/L. If the partial pressure of nitrogen gas in air is 0.76 atm, what is the concentration (molarity) of dissolved nitrogen? 5.2 x 10^ (-4) M 1.1 x 10^ (-5) M 4.

Units of work would be equivalent to a Newton times a meter.

Which of the following terms would you use to describe the motion of Earth in its orbit around the Sun? a. rotation b. ellipse c. solstice d. revolution

Which one of the following compounds is an example of a covalent molecule? a) NaCl b) H2O c) KOH d) Al (NO3) 3