Coal is made of carbon. Coal burns at high temperature in the presence of oxygen. The result of this chemical reaction is

Why is diamond ore not an ore?

The meniscus of mercury in a glass capillary tube is convex because of A) the very high density of mercury as compared with water. B) the low surface tension of mercury C) the greater attraction of mercury atoms to the glass than to each other.

8. The level of the water in the open aquarium tank goes down each day. Why?

Which formula can represent hydrogen ions in an aqueous solution? OH - (aq) Hg2^2 + (aq) H30 + (aq) NH + (aq)

Which of these is a neutral salt? Na2SO4 NaCN KF (NH4) 2SO4

How many grams of water form when 1.24 l of gas h2 at stp completely reacts with o2?

According to the following reaction, how many grams of hydrogen peroxide ( H 2 O 2 ) are necessary to form 0.182 moles oxygen gas? hydrogen peroxide ( H 2 O 2 ) (aq) → water (l) + oxygen (g)

Using the bohr model describe the changes in electrons energy and electron location when an atom changes from the ground state to an excited state.

Sally is making a model of gold for her chemistry class. She has foam balls for the protons, neutrons, and electrons. She has added 70 protons to her model so far. How many more protons does she need to add to complete her neutral atom of gold?

How many electrons are in an atoms of germanium