13) Most living things need oxygen to survive. These two body systems bring oxygen into your body and then move to all your body parts. What are these two body systems?

Which of the models shown below best represents the modern understanding of the structure of the atom?

Which of the following is NOT a property of electromagnetic waves? options: 1. frequency 2. amplitude 3. charge 4. wavelength question 2 Which of the following correctly describes the process of water freezing? 1.

Which of the following solutions can be used to neutralize HNO3? Ca (OH) 2 HCI H2O Lemon Juice

5. How much force is required to accelerate a 12kg mass at 5m/s?

In which specific subshell is the highest energy electron in Ga found?

Which of the following compounds is the most soluble in water? a) propanoic acid b) propane c) propanal d) l-bromopropane

What mass of solid Na2CO3 is required to make 250.0mL of a 0.125M solution of Na2CO3?

The atomic mass of carbon is 12.011 g/mol. how many atoms of carbon have that exact mass? why?

Which option is true about the effect of polarity on solubility? Select all that apply. Polar solutes dissolve better in water than in oil. Polar solutes have the greatest solubility in nonpolar solvents.

Which change results in a release of energy? 1. The melting of H₂O (S) 2. The boiling of water (L) 3. The evaporation of H₂0 (L) 4. The condensation of H₂0 (G)