Which of the following is an exmple of a chemical change? A: burning a candle B:adding food coloring to water C: stirring butter and surgar together D: breaking a rock in peices

The valve between a 2.00-L bulb, in which the gas pressure is 1.80 atm, and a 3.00-L bulb, in which the gas pressure is 3.40 atm, is opened. What is the final pressure in the two bulbs, the temperature remaining constant?

Describe how the reactivity of elements is related to the valence electrons in their atoms

Where should you keep your glass of soda if you want it to remain fizzy

How many iron atoms are there in 2.50moles of each of the following? FeWO4?

Bruce left some butter out in his kitchen. Bright sunlight came in through the window and melted the butter. Heat energy from the sun is called A) conduction. B) convection. C) insulation. D) radiation.

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.

List the number of protons, neutrons, and electrons in Iodine-127. (atomic number is 53)

At approximately what temperature will 40g of argon gas at 2 atm occupy a volume of 22.4L a) 600K b) 550K c) 270K d) 140K