Which is true of chemicals?

A. Things containing chemicals always cost a lot of money.

B. Chemicals are never dangerous.

c. Chemicals are in many substances in a home.

D. Chemicals are rarely found on Earth.

What must always be the same on both sides of a chemical equation?

1. What is the answer to the following expression in the correct number of significant figures? (0.1245) x (0.00003) x (298,000) / (2.0 - 1.5)

When a molecule of nad + gains a hydrogen atom, the molecule becomes reduced. a. True b. False?

I am a cold planet on the surface but hot at my core. There are 11 rings that circle me. You will find 21 moons in orbit around me. I rotate on my side. Which planet am I? A. Pluto B. Jupiter C. Saturn D. Uranus

What is the number of molecules in 19.5 L of nitrogen gas at STP

Would precipitation occur when 500 mL of a 0.02M solution of AgNO3 is mixed with 500 mL of a 0.001M solution of NaCl? Show your work.

What compound is always part of an aqueous solution?

How did scientists carry out research before and after the scientific revolution?

A student was comparing the solubility of equal amounts of table salt and table sugar at different temperatures. The table below shows the four samples that the student used and the temperature of the water that they were dissolved in.

How many cases of measles would you predict were reported last year