A change in the properties of matter that does not change the makeup of the substance is

a chemical change

a physical change

a nuclear change

a covalent change

What can be displayed on a climatic graph?

When 100 g of C6H16N2 (used in nylon) are decomposed, 62.01 g of C, 13.87 g of H, and 24.11 g of N are produced. Find the percent composition.

Cinnabar is an ore of mercury that contains only Hg and S. When a 0.350 g sample of cinnabar is heated in oxygen, the ore decomposes completely to yield 0.302 g Hg metal. What is the empirical formula of cinnabar?

What is the end result of substances mixed together?

In each following pairs, state which one is more likely to give up electrons? a) wood or human hair b) plastic wrap or steel c) cotton or silk

How does a mixture of benzoic acid and benzaldehyde can be isolated separately by extractions?

What is a compound? a) a combination of two or more substances that are not chemically combined b) a combination of two or more elements that are combined in a certain ratio

A gas has a volume of 75mL at a pressure of 200.0 kPa. What will be the new volume be in mL if the pressure is decreased to 60.0 kPa in sig figs

Give two reasons why it's important to work with a partner in a lab

Suppose you have 3.00*1018 reams of lead (pb). how many lead atoms do you have? express the number of atoms numerically.