What describes a change that occurs when one substance reacts to another substance?

If you burn 23.4 g of hydrogen and produce 209 g of water, how much oxygen reacted?

Cylinder A contains a gas whose molecules have an average speed of 0.0000001 meters/sec. Cylinder B contains a gas whose molecules have an average speed of 0.3 meters/sec. Select the statement below that is true regarding these cylinders. options: A.

Compared to size of earth, the atmosphere is very

A student is heating a chemical in a beaker with a Bunsen burner. identify the safety equipment that should be used and the purpose of it for the given scenario.

Q. A Substances that form hydrogen ions when released in water are called ... Choose one high acids bases saturated suspension salt solution hydrogen ions

The temperature of a substance is a measure of the average Select one: a. attractive forces between its molecules b. mass of its molecules c. potential energy of its molecules d. kinetic energy of its molecules

Which molecular geometry is least likely to occur with sp3 hybridization? tetrahedral trigonal planar bent trigonal pyramidal

The number of moles in 118.0g of calcium chloride

You should be worried about the safety of a healthcare product if you see which of the following claims made? a. FDA approved! b. Miracle cure! c. Scientifically tested! d. Effective in double-blind study!

Which branch of science provide the proof that earth is approximately 4.6 billion years old