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

Which of the following are correct statements? Check all that apply. A. An atom is the basic unit matter. B. The atomic number is the number of neutrons an atom has. C. The number of electrons an atom has defines what kind of element it is D.

Rainwater will combine with which atmospheric gas in order to create carbonic acid?

How many atoms of gallium are in 2.85x103 g of gallium?

A precipitation reaction is caused by mixing 100. mL of 0.25 M K2Cr2O7 solution with 100. mL of 0.25 M Pb (NO3) 2 solution. When the precipitate forms, it is filtered from the mixture.

Exposure to 100 R's: will have little effect can cause radiation sickness is enough to kill a person

Which statement is true about the speed of light waves in a medium? a. Depends on the temperature of the light wave b. Decreases with a decrease in density of medium c. Decreases with an increase in density of medium d.

What's a certain indicator that a molecule is polar? the molecule has a nonpolar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms the molecule has a polar covalent bond and the dipole is cancelled due to symmetrical

In the synthesis of barium carbonate from an alkali metal carbonate (M2CO3 where M is one of the alkali metals) a student generated 3.7 g of barium carbonate from 2.0 g of their alkali metal carbonate.

Give the state of matter that water is in as it moves through earths system

What happens to the volume of a substance as temperatures rises?