The formation of aluminum chloride can be described by the balanced chemical equation.

2Al+3Cl2⟶2AlCl3

How many moles of Cl2 molecules are required to react with 2.77 mol Al atoms?
Ammonia gas can be prepared by the reaction

CaO(s)+2NH4Cl(s)⟶2NH3(g)+H2O(g)+CaC l2(s)

In an experiment, 28.5 g of ammonia gas, NH3 , is produced when it was predicted that 41.9 g NH3 would form.

What is the theoretical yield of NH3 ?
theoretical yield:
g
What is the actual yield of NH3 ?
actual yield:
g
What is the percent yield of NH3 ?
percent yield:
hel 1

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma