A compound that is composed of only carbon and hydrogen contains 85.7% c and 14.3% h by mass. what is the empirical formula of the compound?

The volume of oxygen gas changed from 10 ml to 11 ml as the temperature changed. is this a chemical change or a physcial change

Select the statements that are correct with respect to waste disposal in the Electrochemical Cells Experiment. (Select all that apply.) a. Dilute copper and ascorbic acid solutions should be disposed of in the waste container in the hood. b.

What is the actual yield of carbon dioxide gas, if 2.0 g of sodium carbonate reacts with 5.0 g sulfuric acid, to form carbon dioxide gas with a 60.2% yield?

Which of these cause the build up of volcanic landforms? A. ash B. ash and cinder C. ash and lava D. ash, cinder, and lava

Can calcium or magnesium metal be disposed of down the drain

The smallest part of a element that retains the properties of that element

What information can be learned from bloodstains at a crime scene?

1. A window washer does not want to change her position. What does she want the forces acting on her to be? A. small B. large C. balanced D. unbalanced 2. When an object that is moving slows down, which action must be occurring? A. balanced forces B.

Iridium ii phosphate monohydrate

Which of the following does not happen during a chemical change? Mass is gained. New compounds are formed. Old compounds are broken down. Bonds are broken.