Explain how calcium (40Ca20) and flourine (19F9) became stable when they form calcium fluoride.

Explain why are we able to use water displacement to find the volume of the irregular objects in cm3.

List 10 things that are matter and 10 things that are not matter. (Total of 20 things)

The molar heat of vaporization of water is 40.7 kJ mol. How much heat must be absorbed to convert 50.0 grams of liquid water at 100oC to steam at 100oC?

What is the difference between a mechanical wave and an electromagnetic wave? A mechanical wave travels through empty space, while an electromagnetic wave travels through matter A mechanical wave has a short wavelength, while all electromagnetic

Is matter in the plasma state the most common in earth. True or False

Formula for sulfur tetrafluoride

Geologists think that parts of the Appalachian Mountains formed originally from sediments accumulating in shallow swamps. The weight of the sediments caused the area beneath them to sink, allowing more sediments to accumulate.

What volume would 1.5 mol of nitrogen gas occupy at standard temperature and pressure?

State three reason why do you think air is a mixture and water a compound?

Defined the following convection