How are mixtures different than pure substances?

Question 5 options:

Mixtures have lower boiling points.

Mixtures can be separated physically.

Mixtures contain only one type of atom.

Mixtures are less dense than pure substances.

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature