1 Fraction Problems
What is the name of the number that is put next to grams when solving for how many grams are in 1 mole of a chemical?
Molar Mass
If the word mole is in a fraction twice, what numbers do you use in the fraction?
Mole Ratio
Numbers from the chemical reaction/equation
In an equation or fraction that has moles in it only once, what number always goes next to moles?
1
If a questions starts with starts with grams and also ends in grams of a different chemical, how many fractions will be needed to solve?
3 Fractions
Who was the first President of the United States?
George Washington
In an equation or fraction that has atoms or molecules, what number do you have to use?
6.02 E 23
6.02 x 1023
Avogadro's Number
Using the following chemical reaction,
Li2SO4 + Ba(OH)2 --> 2 LiOH + BaSO4
If 10 g of Li2SO4 is initially used, how many moles of LiOH should be produced?
0.18 mol LiOH
In a 3 step/fraction question, the middle fraction will always have the word moles show up how many times?
2 times (twice)
How many grams of Si are in 0.33 mol of Si?
9.24 g Si
What is the name of the tallest mountain in the world?
Mount Everest
How many grams of BH3 are in 2.31 mol of BH3?
32.34 g BH3
Using the following chemical reaction,
4 Fe + 3 O2 --> 2 Fe2O3
How many mol of O2 are needed to fully react with 229 g of Fe?
3.07 mol O2
Using the following reaction
CoI2 + F2 --> CoF2 + I2
If 20 g of F2 is used, how many grams of CoF2 should be produced?
51.05 g CoF2
How many moles of SiF4 are in 398 g?
3.82 moles
Which famous author/play writer wrote popular stories such as Romeo & Juliet, and Hamlet?
William Shakespeare
How many moles of Al(OH)3 are in 68.3 g of Al(OH)3?
0.88 mol Al(OH)3
In 100 g of Ga (gallium) how many atoms are there?
8.63 E 23 atoms
Using the following chemical reaction,
5 C + 2 SO2 --> CS2 + 4 CO
If 34 g of C are intially used, how many grams of CO should be produced?
63.47 g CO
Using the following chemical reaction,
2 H2S + 3 O2 --> 2 H2O + 2 SO2
How many grams of O2 should have been used if 97.4 g of H2O was produced?
1038.9 g O2
What is the gas that allows plants to undergo photosynthesis?
CO2 - Carbon Dioxide
How many moles of I (iodine) are in 4.89 x 1023 atoms of I?
0.81 moles
Using the following chemical reaction,
4 Fe + 3 O2 --> 2 Fe2O3
If 20 mol of Fe2O3 is produced, how many grams of Fe should have been used?
2240 g Fe
Using the following chemical reaction,
2 H2S + 3 O2 --> 2 H2O + 2 SO2
If 114.3 grams of SO2 was produced, how many molecules of H2S should have been used?
1.075 x 1024 or 1.075 E 24 molecules H2S
Using the following chemical reaction,
5 C + 2 SO2 --> CS2 + 4 CO
If 5 mol of SO2 is used, how many grams of C should be used to fully react?
150 g C
The figurative language in the following sentence is called what?
“She has a heart of gold.”
Metaphor