How many grams of cacl2 are needed to make 713.9 g of a solution that is 29.0% (m/m) calcium chloride in water? note that mass is not technically the same thing as weight, but % (m/m) has the same meaning as % (w/w) ?

The lines in an element's atomic spectrum result from electron spins going in opposite directions. energy that is spread out among an atom's electrons. electrons moving from a lower to a higher energy level.

What increases OH ions

Many cold packs contain ammonium nitrate and water. The dissolving of ammonium nitrate is endothermic.

Describe the solid state according to the kinetic molecular theory

Digestion starts in the mouth. What two digestive processes occur there?

The combining of hydrogen and oxygen gas into liquid water is an example of what kind of change? A. Phase B. Chemical C. Physical

Explain evaporation. have a chapter test tommarow!

When the system is at equilibrium, it contains NO 2 at a pressure of 0.817 atm, and N 2 O 4 at a pressure of 0.0667 atm. The volume of the container is then reduced to half its original volume.

Which statement best describes the role of the sun in creating wind? Question 2 options: The rays of the sun push the air in all directions, creating wind The radiation of the sun reacts with water over the ocean The energy of the sun heats the land

Write the formula for a complex formed between zn2 and nh3, with a coordination number of 3.