What is a chemical change that we see everyday?

A student is given a sample of a pure, white crystalline substance. Which of the following would be most useful in providing data to determine if the substance is an ionic compound?

Suppose an nitrogen atom gains two electrons to become an nitrogen ion. what is its electrical charge?

Calculate the morality of each of the following solutions: a. 15.4 g KCl in 289.2 mL solution b. 14.4 g of CaCl2 in 0.614 L solution c. 28.0 mL of 3.00 M H2SO4 diluted to 0.250 L

What are greenhouse gases? a) gases that transmit infrared light b) gases that absorb ultraviolet light c) gases that transmit visible light d) gases that absorb infrared light e) gases that absorb visible light

What's the cause of the difference between alcoholic and lactic acid fermentation?

Energy leaves the sun as light from a region called the?

How many moles of co2 are produced when 10 mol of propane (c3h8) is burned in excess oxygen?

Why are the spheres representing nitrogen and oxygen different colors

How many moles are in 16.94g of water?

Two compound samples are found to have the same mass percentages of the same elements. what can you conclude about the two samples