Determine how many significant figures are in each measurement. (9pts)

0.0908

340.02

5420

12.90

3.09 x 108

0.79

0.02050

0.009

4709

How many grams are in 9.4 moles of NO2?

Gasoline contains only hydrogen and carbon atoms, yet nitrogen oxide and nitrogen dioxide are produced when gasoline burns. What is the source of the nitro - gen and oxygen atoms?

Can you get a negative number for a percent error? If so what does that mean

Which has a higher concentration of water molecules - 200 molecules of water, or a mixture of 300 molecules of water and 100 molecules of food coloring? Explain your answer.

Which statement is true about the reaction between methane and chlorine? They will react spontaneously. They require ultraviolet light to react. They will react in a dark room. They react to produce 1 compound.

How many molecules of sodium nitrate are produced when 17 g of sodium azide, NaN3, react according to the following equation: NaN3 (aq) + AgNO3 (aq) - --> AgN3 (s) + NaNO3 (aq) Question options: 3.7x1023 1.6 x 1023 1.85x1023 6.02x1023

Which statement is true for the given reaction? Zn + PbSO4

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?