Hey there,
(I felt to pity for you. I though no one else would answer it correctly. I would be more than happy to answer) ~Astute.
Question #1
Which contains a greater number of atoms, a mole of silver or a mole of gold?
What weighs more, a pound of crackers or a pound or computers. This is the same question, they both have the same amount of weight. Your answer would be "They both contain the same number of atoms."
____________________________________________________________
Question #2
The percent composition of elements in a compound is determined from the compound's chemical formula by dividing the total mass of an element present in the formula by the molar mass of the compound. (T/F)
This would be a [tex]TRUE[/tex] statement.
_____________________________________________________________
Question #3
One way to determine the empirical formula of a compound involves using the percent composition of the compound.
Based on my search, this statement above would also be a [tex]TRUE[/tex] statement.
____________________________________________________________
Question #4
In the equation, 2H2 + O2 -----> 2H2O, which substance(s) are the reactant(s)?
Your correct answer would be hydrogen and oxygen which would be H2 and O2
_____________________________________________________________
Question #5
In a chemical equation for a reaction, the arrow sign -----> means "yields" or "produces."
This would be [tex]FALSE[/tex] because in a chemical equation for a reaction, the arrow sign means (not produces) but (product).
____________________________________________________________
Question #6
What type of reaction is represented by the following chemical equation? CH4 + 2O2 ----> CO2 + 2H2O + heat/light
Combustion would be the correct answer to this question.
_____________________________________________________________
Question #7
What is produced during any combustion reaction?
(Oxygen, water) would the production during any combustion of that reaction. So based from your options, the correct answer would be A.)
_____________________________________________________________
Question #8
In the reaction Fe2O3 + 3CO ------> 2Fe + 3CO2, 10 moles of solid iron and 15 moles of carbon dioxide are produced from 5 moles of iron (III) oxide and 15 moles of carbon monoxide (CO). What is the mole ratio of carbon monoxide to solid iron?
Your correct answer would be 3:2 Basically because [tex]F e_{2} 03(s)+ . . . . . .3COv2(g)[/tex]
____________________________________________________________
Question #9
Solid ammonium nitrate (NH4NO3) reacts, over time, to form nitrogen, oxygen, and water gases. This is a synthesis reaction.
This statement above would be a [tex]TRUE[/tex] statement based on my research. That would be a synthesis reaction.
_____________________________________________________________
Question #10
What is the mole ratio of oxygen to propane (C3H8) in the following equation?C3H8 + 5O2 -----> 3CO2 + 4H2O
I believe but I have a good vibe that 5:1 would be your answer because as I was doing that work, I got an answer similar to this but not exact.
_____________________________________________________________
Last Question =)
Lithium reacts with bromine (Br2) in a synthesis reaction to produce lithium bromide. Determine the limiting reactant if 25.0 grams of lithium and 25.0 grams of bromine are present at the beginning of the reaction.
Your correct answer would be "limiting reactant = both lithium and bromine" pretty much because 2Li + Br2 -->2LiBr gives the mass of the reactant.
_____________________________________________________________
I spent like 45 minutes on these question(s) XD, I'm like so tired. I hope this helps not only you, but everyone else who has this question.
~Astute
