The product of (1.400 × 10-1)(6.02 × 1023) will have how many significant figures?

Round off the following to three significant figures: 0.032000000 cg

A graduated cylinder contains 20.0 mL of water. An irregularly shaped object is placed in the cylinder, and the water level rises to the 31.2 mL mark. If the object has a mass of 63.1 g, what is its density?

Perform the following calculation and answer to the correct number of significant figures:             4.50 km x 12.5 km x 22 km

Calculate the following and record the answer the the proper number of significant figures. (45.68 – 45.65) x (32.1 + 89.9)

Which of the three major subatomic particles has/have a charge of –1?i.  electronii. protoniii. neutron

If the density of steel is 7.85 g/cm3 and the density of rust is 5.24 g/cm3 calculate the masses of 67.6 cm3 cubes of both materials respectively (one solid cube of steel and one solid cube of rust).

2.7 kilograms contain this many grams.

The temperature in the laboratory is posted as 251 K. What is this temperature in degrees Celsius?

Express the number 178414 in scientific notation.