A chemist determined by measurements that. 040 moles of gold participated in a chemical reaction. calculate the mass of gold that participated in the chemical reaction. round your answer to significant digits.

What is the ratio of fe 3 ions to o2 - ions in a neutral compound? a. 1:2b. 2:1c. 2:3d. 3:2

If the volume of a container of gas is reduced, what will happen to the pressure inside the container? a. The pressure will increase. b. The pressure will not change. c. The pressure will decrease. d. The pressure depends on the type of gas.

A major component of gasoline is octane (C8H18). When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of water produced by the reaction of 1.00 mol of oxygen.

Which of the following elements is the most metallic? a. K b. KR c. FE d. CU

Sugar dissolving in tea is it chemical or physical change?

How fast can a turbidite bed form? a matter of minutes a matter of seconds a matter of hours a matter of years

The half-life of carbon-14 is 5,730 years. How many grams of parent material will remain from a 100-gram sample of carbon-14 after 2 half-lives? 75 6.25 12.5 25

Which of the following describes the difference between nitrogen-14 and nitrogen-15? A. Nitrogen-14 has 14 electrons, 14 protons, and 14 neutrons; nitrogen-15 has 15 electrons, 15 protons, and 15 neutrons. B.

How do you balance an equation?

What is the force caused by wind pushing on a building?