What is the symbol for the second most common element in the universe?

a. H

b. C

c. Fe

d. He?

Solar power and wind power are similar because A. they are both non-renewable energy sources. B. they both are powered by water. C. they are both dependent upon weather and location. D. they both are very expensive to operate.

Some tools have graduations to show multiple measurements. For example, a ruler may have graduations for both millimeters and centimeters. When measuring the length of an earthworm, which graduations would allow for the most accurate measurement? a.

The blank variable response to changes in the manipulated variable

Briefly explain the process of refining of petroleum.

What will happen when 200ml of 3.0m naoh and 100ml of 3.0 m hcl are combined?

Predict the empirical formula of these compounds. a. C2N2. b. P4O10. c. N2O5. d. NaCl. e. C9H20. f. B2H6. g. K2Cr2O7. h. Al2Br6. i. C6H6. j. SiCl4

What happens when the cold finger is placed in the hot water? what direction did the heat travel from the hot water?

For a neutral Nitrogen, how many electrons are in the 2p electron orbitals?

A neutral atom has an atomic number of 20 and a mass number of 41; how many protons, neutrons, and electrons are found within the atom?

Which of the following are dwarf planets Ceres Nama is Eris Charon Haumea Makemake Pluto