436 K = °C

163

709

-163

-709

A scientific (blank) describes what happens, but a scientific (blank) describes for what reason it happens

Which term defines the amount of water that is in the air compared to how much water the air could hold at a given temperature? A. frost B. humidity C. relative humidity D. dew

Water obtained from natural resources does not show neutral pH. What is the reason behind this? The neutral nature of water changes due to its ability to dissociate into H + and OH - ions.

Nickel has 28 protons if it has 31 neutrons, what is it's atomic mass? A) 3 B) 28 C) 31 D) 59

Which of the following has the largest % of sodium, 20g of sodium fluoride, 20g of sodium chloride, or 20g of sodium bromide?

Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the a) activation energy b) number of collisions c) fraction of the reacting particles which possess energies greater than the activation energy

If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?

Is evaporation/condensation a physical or chemical change? Explain

Would the two as yet undiscovered elements A+1 and D+2 react?

Ammonium perchlorate is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen gas, chlorine gas, oxygen gas and water vapor, releasing a great deal of energy.