Most elements are Select one:

a. metals.

b. nonmetals.

c. metalloids.

d. semiconductors.

A 20.0 L gas cylinder has been filled with 4.00 moles of gas. You measure the pressure to be 4.20 atm. What is the temperature inside the tank? Express your answer to three significant figures and include the appropriate units.

What is the ratio of Fe+3 ions to O2 - ions in a neutral compound? a. 1:2 b. 2:1 c. 2:3 d. 3:2

Is beer a mixture or compound?

You may experiment alone if you apply which of the following safety precautions? A.) Work with safe chemicals B.) Wear all protective equipment C.) Follow all safety protocols D.) Never work alone

Calculate the mass per liter of solid lead (ii) phosphate (ksp = 1.00 x 10-54) that should dissolve in 0.270 m lead (ii) nitrate solution.

There are five elements named for famous scientists on the periodic table

What character acids is that they react with metals to

The energy of a particular color of green light is 3.81*10-22 kJ/photon. The wavelength of this light is nanometers

How many molecules are in. 25 mole of O2

A flexible container is filled with 960.0 liters of air at 38 degrees Celsius. If pressure in the container does not change, at what temperature will the container have at a volume of 350.0 liters?