Name: __________________________
Chemistry Math Skills --Understanding that “variables” represent both numbers and units.
Use a calculator to solve each problem. Record your work in your chemistry notebook (or on a sheet of paper),
* FOR Q # 1 and 2 : show“formula”, “fill-ins” (substitution), rearrangement to “isolate unknown”, final answer.
OR show “formula”, rearrangement to “isolate unknown”, “fill-ins” (substitution), final answer.
*1. Working with NUMBERS : Using the given algebraic expression relating the pressure (P), volume (V), number of moles (n), the gas laws constant (R), and Kelvin temperature of a gas (T), solve for T.
PV = nRT P = 2 V = 3 n = 12 R = 8 T = ___________
*2. Working with UNITS : Given the following units, solve for the unit belonging to “R”.
PV = nRT P = atmosphere V = Liter n = mole T = Kelvin R = ____________
3. Dimensional Analysis
: Working with relationships using fractions called “factors”. Solve any way you can.
Show all work.
A.
A chemistry student measures the volume of 45.0 drops of water and determines it to be 2 .
00 milliliters.
What is the volume of 1.00 drop? Show at least 3 things: your “set-up”, your “fill-ins”, and final answer.
B.
This student measures its mass and determines that the density at room temperature is 0 .
997 grams / milliliter. Knowing that that 1 .
80 grams of water contains 6 .
02 x 10
23
molecules, calculate the number of molecules in a drop.
Name: __________________________
Chemistry Math Skills --Understanding that “variables” represent both numbers and units.
Use a calculator to solve each problem. Record your work in your chemistry notebook (or on a sheet of paper),
* FOR Q # 1 and 2
: show“formula”, “fill-ins” (substitution), rearrangement to “isolate unknown”, final answer.
OR show “formula”, rearrangement to “isolate unknown”, “fill-ins” (substitution), final answer.
*1. Working with NUMBERS : Using the given algebraic expression relating the pressure (P), volume (V), number of moles (n), the gas laws constant (R), and Kelvin temperature of a gas (T), solve for T.
PV = nRT P = 2 V = 3 n = 12 R = 8 T = ___________
*2. Working with UNITS : Given the following units, solve for the unit belonging to “R”.
PV = nRT P = atmosphere V = Liter n = mole T = Kelvin R = ____________
3. Dimensional Analysis : Working with relationships using fractions called “factors”. Solve any way you can.
Show all work.
A.
A chemistry student measures the volume of 45.0 drops of water and determines it to be 2 .
00 milliliters.
What is the volume of 1.00 drop? Show at least 3 things: your “set-up”, your “fill-ins”, and final answer.
B.
This student measures its mass and determines that the density at room temperature is 0 .
997 grams / milliliter. Knowing that that 1 .
80 grams of water contains 6 .
02 x 10
23
molecules, calculate the number of molecules in a drop.