8. Which of the following would you prefer to use while reading small words in a dictionary?

a. Concave mirror

b. Concave lens

c. Convex mirror

d. Convex lens

2. What is the process of diverting un- wanted electric charge directly into the earth?

piece of copper iron silver and gold are dropped into a solution of iron sulphate the piece that will get a coating of a copper is known as

What is the final temperature of 78g sample of water at 99°C if it loses 6500 J of heat energy?

Describe how you could find the mass of the irregular object without use of a balance

What happens to the density of a fluid when its heated?

The internal pressure of a cylinder with one ounce of liquid r410a which has been sitting in 100 degree truck

The transfer of from one molecule to another is an oxidation-reduction reaction, or redox reaction.

Banded iron formations were caused by the production of which atmospheric gas? A) Carbon Dioxide B) Water Vapor C) Oxygen D) Nitrogen

3. Which net ionic equation describes this reaction? 3Ca (OH) 2 (aq) + 2FeCl3 (aq) → 3CaCl2 (aq) + 2Fe (OH) 3 (s) 3Ca2 + (aq) + 3OH - (aq) + Fe3 + (aq) → Fe (OH) 3 (s) + CaCl2 (aq) Fe3 + (aq) + 3OH - (aq) + 3Ca2 + (aq) → Fe (OH) 3 (s) + 3Ca2 + (aq)

How many moles of methane are produced when 25.1 moles of carbon dioxide gas react with excess hydrogen gas?