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Sagot :
Step-by-step explanation:
1. N2 + 3H2 → 2NH3
How many moles of NH3 could you make with 4.2021 g of N2?
From the reaction;
1 mol of N2 produces 2 mol of NH3
1 mol of N2 = 14g of N2
14g of N2 produces 2 mol of NH3
4.2021 g of N2 produces x mol of NH3
14 = 2
4.2021 = x
x = 4.2021 * 2 / 14 = 0.6003 mol of NH3
2. 2Na + Cl2 → 2NaCl
How many moles of Cl2 do you need to use in order to react with 34.485 g of Na?
From the equation of the reaction;
2 mol of Na reacts with 1 mol of Cl2
1 mol of Na = 23g of Na
2 mol of Na - 46g of Na
46g of Na reacts with 1 mol of Cl2
4.485 g of Na reacts with x mol of Cl2
46 = 1
4.485 = x
x = 4.485 * 1 / 46 = 0.0975 mol of Cl2
3. H2SO4 + 2NaNO2 → 2HNO2 + Na2SO4
How many grams of NaNO2 do you need in order to make 24.14714 g of Na2SO4?
From the reaction;
2 mol of NaNO2 produces 1 mol of Na2SO4
2 mol of NaNO2 = 68.995 g/mol * 2mol = 137.99g
1 mol of Na2SO4 = 142.04 g
137.99g of NaNO2 produces 142.04 g of Na2SO4
xg of NaNO2 produces 24.14714 g of Na2SO4?
137.99 = 142.04
x = 24.14714
x = 24.14714 * 137.99 / 142.04 = 23.459g
4. 2Na + 2H2O → 2NaOH + H2
How many grams of NaOH could you make with 8.0465 g of Na?
From the reaction;
2 mol of Na produces 2 mol of NaOH
2 mol of Na = 23g/mol * 2mol = 46g
2 mol of NaOH = 40g/mol * 2 = 80g
46 g of Na produces 80g of NaOH
8.0465 g of Na produces xg of NaOH
46 = 80
8.0465 = x
x = 8.0465 * 80 / 46 = 13.994g
5. 2Mg + O2 → 2MgO
If you are burning 5.8332 g of Mg, how many grams of MgO will this make?
From the reaction;
2 mol of Mg produces 2 mol of MgO
2 mol of Mg = 24 g/mol * 2mol = 48g
2 mol of MgO = 40.3 g/mol * 2mol = 80.6g
48g of Mg produces 80.6 g of MgO
5.8332 g of Mg produces xg of MgO
48 = 80.6
5.8332 = x
x = 5.8332 * 80.6 / 48 = 9.8g
6. FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl
How many grams of NaCl could you make with 2.43306 g of FeCl3?
From the reaction;
1 mol of FeCl3 produces 3 mol of NaCl
1 mol of FeCl3 = 162.2 g
3 mol of NaCl = 58.44 g/mol * 3 mol = 175.32 g
162.2g of FeCl3 produces 175.32 g of NaCl
2.43306 g of FeCl3 produces xg of NaCl
162.2 = 175.32
2.43306 = x
x = 2.43306 * 175.32 / 162.2 = 2.63g
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