The big bang theory suggests that the universe is how old

What is the pressure of the ideal gas when the volume is decreased to 4.0 L and the temperature is increased to 265 K? Pressure = 2.0atm volume = 5.0L temp. = 215 K

Can y'all tell me what's an atom and a mole

What are mettalic substances

A chemistry student needs 75.0ml of pentane for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of pentane is 0.626·gcm-3. calculate the mass of pentane the student should weigh out.

The compound nicl2 is an ionic compound. what are the ions of which it is composed?

Which of the following are chemicals? A. clothing B. food C. fuels D. all of the above

How many valence electrons are in atom of sulfur?

My sister needs this answered! Donald is creating an experiment to determine if fertilizer affects plant color. He makes this statement: "If each plant receives a different amount of fertilizer, then the plant's color intensity will change.

What would happen to life if earth were in a different location within the solar system

Substance that undergoes a change in a chemical reaction is a. a product c. a reactant. b. a chemical. d. an enzyme.