The molar mass of HF is 20.01 g/mol. How many moles of Sn are required to react with 40 g of HF?

One molecule of glucose makes 30 molecules of atp. how many molecules of glucose are needed to make 6000 molecules of atp in aerobic respiration?

A farmer lost most of his crops last year because of insects. This year he decided to use pesticide to kill the insects.

What information guided Mendeleev as he placed elements in his periodic table

A chemist weighed out 20.7 g of sodium. Calculate the number of moles of sodium she weighed out

How many electrons are contained in the p orbital of the methyl radical?

Suppose a variation makes an individual member of a species better adapted to its environment. how might the variation affect the individual's reproduction.

What was the weight percent of water in the hydrate before heating? Put answer in one decimal place. weight of water 0.349 weight of hydrate 2.107

Define meteorologist.

How do decomposers get energy? A. by making their own food B. by eating other organisms C. by converting light energy into chemical energy D. by breaking down the waste materials of dead organisms

Among the following, which is a binary molecular compound? Question 7 options: CO2 NaCl MgS FeO