Ow many molecules of carbon tetrafluoride, CF4, are in 176 grams of CF4?

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?