A pain-relieving pill has a mass of 0.005 g. Express the pill's mass in grams using scientific notation or in milligrams.

Which of the following could be the molecular formula for an alkane? A - C7H16 B - C7H14 C-C7H12 D-C7H10

In 2.5 mole SO42-, there are A) 2.5 Eq. B) 5.0 Eq. C) 1.0 Eq.

Which answer below correctly identifies the type of change and the explanation for the change in calcium carbonate?

If you dont know the percent composition of a substance, can you determine its molecular formula

The most concentrated solution is A. 2 scoops of solute, 500 ml water B. 4 scoops of solute, 750 ml water C. 4 scoops of salute, 1000 ml water D. 1 scoop of salute, 250 ml water

Which of the following is true concerning the noble gases? A. Their highest occupied s and p sublevels are filled. B. They belong to Group 8A. C. They are sometimes referred to as the inert gases. D. all of the above

Which of the following is responsible for passing albinism from a parent organism to its offspring?

Rubidium has two naturally occurring isotopes, rubidium - 85 (atomic mass = 84.9118 amu; abundance = 72.15%) and rubidium - 87 (atomic mass = 86.9092; abundance = 27.85%). Calculate the atomic weight of rubidium

You are asked to analyze an aqueous solution (X) and determine what's in it. You pour some of your sample X into a test tube and add a few drops of an acid. No observable reaction occurs.

Which of the following items represents a chemical change? burning melting evaporation freezing