Which of the following represents a pair of isotopes?

F 1h and 3h

G 16O2 - and 19F-

H 40K and 40Ca

J 16O2 - and 32S2-

Which element can form as ionic compound with a hailde?

What part of earth is a solid composed of iron and nickel?

A solution of sugar contains 35 gramsof sucrose, C12H22O11in 100 mL of water. What is the percent composition of the solution?

Balance the chemical equation К+O2= К2O

The volume of a gas increases from 2.0L to 2.25L. If the original pressure was 1.1 atm calculate the new form.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?

Which one of the following Acids is most likely to hurt you? Acid A: 1.0 M; Acid B: 0.0001M

Which statement accurately describes the atoms of a specific element? explain your answer in complete sentences. A. A Neon, Ne, atom contains 10 electrons outside the nucleus and 11 neutrons inside the nucleus. OR B.

What is the volume of 2.00 moles of chlorine (cl2) gas at stp, to the nearest tenth of a liter?

A reaction of 12.640 g of copper oxide with 0.316 g hydrogen produces 2.844 g of water and Xg of copper. X=_9