1. what is meant by good conductor of heat? give 2 examples of good conductors of heat.

The half-life of a radioactive isotope is 20.0 minutes. What is the total amount of a 1.00-gram sample of this sample of this isotope remaining after 1.00 hour?

Which element in group 16 is most likely to gain an electron?

How are solids, liquids, and gases similar? How are solids, liquids, and gases similar?

Which of the following is a combustion reaction? A. NaOH + HCI + NaCl + H20 B. MgSO4 + Ba → BaSO4 + Mg C. C3H8 + 502 + 3C02 + 4H20 D. CO2 + H2O → H2CO3

Chandra wants to know how many moles are contained in 150.0 g CCl4 (carbon tetrachloride). What quantity of CCl4 should she use to make this conversion? number of molecules molecular mass molar mass mole ratio

A sample of gas has a volume of 0.600 L at a temperature of 303 k. If the volume is increased to 0.900 L, what is the new temperature?

What is the correct name of the compound Hg2CrO4? (a) Mercury (l) chromate (b) Mercury (ll) chromate (c) Mercury dichromate (d) Dimercury chromate (e) Monomercury chromate

Is Free Energy positive or negative in boiling water?

What is one element in the same family as oxygen?

Why does a ball rolling along a level sidewalk slow down and then stop