For the complete combustion of 1.000 mole of methane gas at 298 K and 1 atm pressure, ΔH° = - 890.4 kJ/mol. What will be the amount of heat released when 1.97 g of methane is combusted under these conditions?

The frequency of sound wave determines what?

1) When elements combine to form compounds: A) their properties are an average of all elements in the compound. B) their properties change completely. C) their properties do not change. D) their properties are completely random. E) none of the above

An iron ore was found to contain 92.0% pyrite (fool's gold). Pyrite has the formula FeS2and is 46.5% iron. How many grams of iron are there in 50.8 grams of iron ore?

By examining electron domain geometry one can determine that the ammonia molecule (nh3) has A. one sp2 orbital B. two sp2 orbitals C. three sp2 orbitals D. four sp2 orbitals

A 45.0-ml sample of nitric acid solution is neutralized by 119.4 ml 0.200M NaOH solution. What is the molarity of the nitric acid solution?

In a closed system, if a gas is transported to a container with double the volume of the previous container, gas was held in, What is the gases' new volume?

Rebekah is studying a molecule and trying to determine if it is DNA or RNA. Which kind of molecule is she studying? carbohydrate protein nucleic acid lipid

The function of most proteins depends primarily on the

Compare the temperature of water as ice begins to form with the temperature of ice as it begins to melt?

Which elements are present in sugars?