How many atoms are in
C6H12O6?
24
This change does NOT change the atoms or molecules present:
Physical
Density is mass divided by volume
"love your density"
D = m/v
Coefficients in a balanced equation indicate how many moles and grams of each molecule are needed for the reaction.
TRUE OR FALSE
True
remember- to convert - you must get to a mole conversion first.
How many moles of K2CO3 are in a 150.0 g sample of a compound?
1.085 moles
150.0 g x ___ 1 mole__ =
grams from table
C6H12O6?
6
This type of reaction changes the atoms or molecules present.
Chemical
Gold has a density of 19.3 grams per mL.
Solve for density- V = 34 mL ; using density from above to solve for mass.
Mass = ?
660 grams
If given 12.3 moles of N2H4O3, what is the mass of the sample?
984 g
12.3 x _80g__
1 mole
HO:
If given the number of moles of a substance and asked to convert to grams, you should:
multiply by the mass of 1 mole of that substance
moles x __grams__
1 mole
What is the formula for Ammonium?
A physical change or a phase change could be melting.
TRUE OR FALSE
TRUE
Is the sample above gold?
Yes
relating the quantities of different substances in a chemical equation is:
Stoichiometry
HO:
What is the mass of a MgBr2 sample if it contains 0.342 moles of the compound?
63.0 g
What is the charge for hydroxide?
OH-
-1
Water is unique in that the liquid phase is MORE dense than the solid phase.
TRUE OR FALSE
TRUE
ice floats
What type of reaction is this?
The limiting reactant is responsible for determining how much product is produced.
True OR False
True
HO:
Acids taste:
HO:
sour.
What is the name for KClO3
potassium chlorate
A phase change where the particles move closer together would be:
freezing
liquid to solid
particles move closer or are more tightly packed
carbon dioxide and water
complete is above.
Incomplete forms carbon monoxide
The simple, whole-number ratio for the atoms in a molecule is called:
empirical formula
HO:
Molarity is:
(what is the formula?)
HO:
moles of solute divided by liters of solution
mol/L