ch 3+ 4 chemistry review

express 304,000 in correct scientific notation (use E for the x 10)

Express 2.5 x 10 -3 in normal notation

Joules is the SI unit of ____

• time

• luminous intensity

• pressure

• energy

• volume

150 daJ = ? cJ

a graduated cylindar is marked off by increments of .1. It contains a liquid that appears to be close to the 9 ml ine. Which one of these would be the best reading for the volume?

• 9 ml

• 9.1 ml

• 9.01 ml

• 9.001 ml

How many significant figures in 3.000?

Round 304.568 off to 4 significan figures

3.415 x 6.37= 21.75355 How should the answer to this problem be correctly rounded?

2.35 + 818.445= 820.795 How should this number correctly be rounded?

If 255 mg of a liquid is .9344 ml, what is the density of the liquid?