Which pair of species have the most nearly

identical atomic and molecular properties?

1. 35/17Cl and 80/35Br

2. 7/3Li and 9/4Be

3. 23/11Na and 23/11Na+

4. 19/9F and 19/9F-

5. 12/6C and 13/6C

How many significant figures does 0.0006510 of have?

Zero is the temperature at which all molecular motion stops

A gas sample occupies 4.2 L at a pressure of 101 kPa. What volume will it occupy if the pressure is increased to 235 kPa? 9.8 L 1.8 L 3.2 L 7.4 L

All elements can be classified as metals, metalloids, or?

When the following reaction is balanced with the lowest possible whole number coefficients, what is the coefficient in front of the potassium chloride (KCl) ? K2CO3 + FeCl3 yields KCl + Fe2 (CO3) 3 8 6<? 4 3

What is an alloy consisting primarily of iron and carbon

How many moles of H2O are there in1.0g of H20?

Which property of gases allows them to be stored at high concentrations in a bottle of air freshener? What changes occur at the molecular level when ice cream melts and forms a liquid?

a gas has a volume of 6 liters and a pressure of 1.5 atm. if the container is compressed to a volume of 2 liters, what will the pressure of the gas be?

When metals react with nonmetals, an ionic compound generally results. what is the predicted general formula?