Naming
Write the chemical formula for lithium phosphate
Li3PO4
If a gold coin displaces a volume of 1.57 ml in a graduated cylinder, what is the mass of the coin? Density of gold = 19.32 g/ml
30.3 g
Calculate the molar mass of Ca3(PO4)2
310 g/mol
The radius of a gold atom is 0.0000017 meters. What is the size in micro meters?
1.7 um
Determine the correct set of coefficients to balance the chemical equation.
____C6H6 + _____O2 -> _____CO2 +_______ H2O
2C6H6 + 15O2 -> 12CO2 + 6H2O
What is the formula name for NiF2?
Nickel (II) fluoride
Calculate the amount of heat required to heat a 45 kg sample of ethanol from 11.0 to 19.0 C. The heat capacity for ethanol is 2.42 J/g C.
8.7 x 105 J
A sample of pure silver (Ag) has a mass of 155 g. How many atoms are in this sample?
8.64 x 1023 atoms
How many microliters of solution are there in 0.2553 mL?
2.554 x 102 microliter
Complete the following precipitation reaction.
AgNO3 (ag) + Na2CO3 (aq) ->
2AgNO3 (ag) + Na2CO3 (aq) -> Ag2CO3 (s) + 2NaNO3 (aq)
Write the chemical formula for chloric acid.
HClO3
What is the volume of a aluminum rod that weighs 45.6 g and has a density of 27.01 g/ml?
1.69 ml
What is the mass percent N in C2H8N2
47%
A Grande Latte from Starbucks has a volume of 473 cm3. What is this volume in m3?
4.73 x 10-4 m3
Calculate the mass of Na2CO3 that is produced when 10.0 g of NaOH reacts with an excess of carbon dioxide?
2NaOH + CO2 -> Na2CO3 + H2O
13.3 g Na2CO3
What is the chemical compound for BBr3
Boron tribromide
A 4.50 g coin of copper absorbed 54 calories of heat. What was the final temperature of the copper if the initial temperature was 25°C? The specific heat of copper is 0.092 cal/g°C.
155 °C
What is the mass of phosphorous (P) in 243.5 g copper(II) phosphate.
39.68 g P
Convert 2.4 x 104 g/L to kg/mL
2.4 x 10-2 kg/mL
Given the UNBALANCED reaction: Mg3N2 + K2O -> MgO + K3N
If 153 g of potassium oxide reacts with an excess amount of magnesium nitride, how many grams of potassium nitride will be made?
142 g K3N
What is the chemical formula for potassium acetate?
KC2H3O2
If a material has a mass of 18.7 g and displaces 5.6 cm3 of water, what is the density in kg/m3?
3.34 x 103 kg/m3
A compound is 52.14% C, 13.13% H and 34.73% O by mass. What is the empirical formula of the compound?
C2H6O
Today the temperature in Camarillo is 61 F and in Paris it is 12 C. What is the difference in temperature between the two locations in Kelvin.
T(C) = 5/9[T(F) - 32] T(K) = T(C) + 273
4 K
When iron (II) hydroxide is mixed with phosphoric acid, iron (II) phosphate precipitate and water results. If 3.20 g of iron (II) hydroxide is treated with 2.50 g of phosphoric acid, how many grams of iron (II) phosphate precipitate can be formed? (note - need to consider the limiting reactant)
4.26 g Fe3(PO4)2