A mixture is made of two or more materials that A. Can only be separated by chemical means. B. Cannot be separated by any means. C. Cannot be separated by physical means. D. Can be separated by physical means.

To identify a liquid substance, a student determined its density. Using a graduated cylinder, she measured out a 45-mL sample of the substance. She then measured the mass of the sample, find ing that it weighed 38.5 g.

Which of the following most likely happens when the number of particles of a gas decreases? 1. The pressure of the gas increases. 2. The pressure of the gas remains the same. 3. The number of collisions of gas particles decreases. 4.

What is the mass of 4.95 x 10^21 platinum atoms?

Which feature is most likely found at a divergent boundary? V O fold O plateau O fault-block mountain O anticline or syncline

Which compound has both ionic and covalent bonding? (a) CaCO3 (b) CH2Cl2 (c) CH3OH (d) C6H12O6

In radiation therapy, a. isotopes are traced through a chemical reaction. b. un6y human cells are destroyed. c. radioactive isotopes are used as fuel. d. weak spots in water pipes are found.

What is density of an apple

Describe the pat of a carbon atom through the process of cellular respiration

Write the complete electron configuration for the common monatomic ion formed by the element calcium, ca.

What is the ph of a solution that results from mixing together equal volumes of a 0.020 m solution of ammonia and a 0.010 m solution of hydrochloric acid? (pka of nh4 + = 9.25) ?