Round off each of the following numbers to two significant figures:

(a) 0.436

(b) 9.000

(c) 27.2

(d) 135

(e) 1.497 X 10-3

(f) 0.445

Because of the lack of reactives in a laboratory, you wish to prepare a solution of AgNO3 0.1 N, given two solutions, the first 0.0825N and the second 0.7280N. What volume of each of them you'll have to mix to obtain 1lt of the solution you want?

A sample of oxygen gas at a pressure of 1.14 atm and a temperature of 21.5 degrees Celsius, occupies a volume of 815 ml. If the gas is compressed at constant temperature until it's pressure is 1.62 atm, the volume of the gas will be what?

How many milliliters of. 5 M HCl will neutralize 35 mL of 1 M NaOH? A) 70 mL B) 50 mL C) 35 mL D) 65 mL

How does fermentation that causes dough to rise differ from fermentation in muscles?

Which of the following is not an indication of a chemical change? formation of a precipitate formation of a gas the container gets hot the substance dissolves

Do pure substances have the same chemical and physical properties

How is matter conserved in a chemical reaction

Define Percent transmittance

Express (3 x 104) (4 x 1023) in scientific notation

The theoretical yield of aspirin in a reaction is 721 g. What is the percent yield if 461 g is produced?