What is the chemical symbol and name of the third element in the periodic table

Can two organisms belong to the same family but different classes? Explain.

At constant temperature and volume, a sample of oxygen gas is added to a sample of nitrogen gas. The pressure of the mixture is found by adding the pressures of the two individual gases.

What might appear in a plains ecoregion after a heavy rain

If you have 50.0 g samples of each of the 5 metals and water, and you add 400 cal of energy to each, which substance will have the largest resulting temperature change? (Use the metals listed in problem 2 to answer this problem.)

A container holds 3.0 g of hydrogen. if it is evacuated and filled with methane at the same temperature and pressure, what is the mass of methane

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.

Why is it is difficult to compress a liquid? a. liquid takes the shape of its container. b. the liquid particles flow away when compressed. c. liquid becomes solid when compressed. d. the liquid particles are very close together.