Which of the following is an igneous rock?

granite

marble

limestone

sandstone

Where are the protons, neutrons, and electrons located in an atom? 1) protons, neutrons, and electrons are found in the nucleus 2) neutrons and electrons are in the nucleus while the protons surround the nucleus 3) protons and neutrons are in the

When 10.0 g of lead are heated with 1.6 g of sulfur, 11.6 g of lead sulfide are formed. how many grams of lead sulfide form when 10.0 g of lead are heated with 3.0 g of sulfur?

The windchill index tells you A. the temperature of the water during winter. B. the amount of moisture in the air. C. how wind and temperature affect your body in winter. D. how wind speed affects heating needs for structures

Hydrogenation reactions are used to add hydrogen across double bonds in hydrocarbons and other organic compounds. use average bond energies to calculate δhrxn for the hydrogenation reaction.

Aquaculture is the practice of farming sea organisms as a renewable food resource. Ture or false?

Which pair of nitrogen bases will form a bond in a DNA molecule? a. cytosine and adenine b. adenine and thymine c. guanine and thymine d. thymine and cytosine

Most meteors that fall into the earths atmosphere burn up before reaching the ground. Why is this?

Imagine a chemist is in the lab and trying to make some chemical reactions happen. In one reaction she reacts chemicals in an exothermic reaction and there is an increase in entropy.

Which of the following requires an oxidizing agent? Al yields Al3+ 2 O yields O2 Cl2 yields 2 Cl- Ag + yields Ag

Type of ion formed by group 2A elements