Has an asteroid hit Earth in the past

How many molecules are in 8.3 moles?

Can this balance be read to the nearest milligram? yes no

Explain why some parts of our planet have very little seasonal change. Where are these places?

AlF3 is almost insoluble in anhydrous HF but dissolves if KF is present. passage of BF3 through the resulting solution causes AlF3 to precipitate ... can anyone explain the idea behind this?

Which statement concerning the reversible reaction 2 NO2 (g) - N204 (9) is true? NO2 is the product of the forward reaction. OA The reverse reaction produces N204. At the start of the reaction, the forward and reverse reaction rates are equal.

Cobalt fluoride crystallizes in a closest packed array of fluoride ions, with the cobalt ions filling one-half of the octahedral holes. What is the formula of this compound?

When you get into a parked car in the summer time, the metal clip is hot and the seat belt fabric is not. What has a higher specific heat, the metal clip or the seat belt fabric? Think about the definition of specific heat.

A laboratory procedure calls for making 600.0mL of a 1.1M KNO3 solution. How much KNO3 in grams is needed?

How do you make good grades?

What will happen to the pressure inside a rigid container of gas if some of the gas is allowed to escape? (Assuming no change in temperature)