The mass in grams of 8.94×10²² formula units of CuF₂ is 15.07 g
<h3>Avogadro's hypothesis </h3>
6.02×10²³ formula units = 1 mole of CuF₂
But
1 mole of CuF₂ = 101.5 g
Thus,
6.02×10²³ formula units = 101.5 g of CuF₂
<h3>How to determine the mass of 8.94×10²² formula units of CuF₂</h3>
6.02×10²³ formula units = 101.5 g of CuF₂
Therefore,
8.94×10²² formula units = (8.94×10²² × 101.5 ) / 6.02×10²³
8.94×10²² formula units = 15.07 g of CuF₂
Thus, 8.94×10²² formula units are present in 15.07 g of CuF₂
Learn more about Avogadro's number:
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Answer:
202,020 pennies
Explanation:
The amount of pennies in 1 dollar is 100.
Basically, you just multiply the whole dollar amount (2020) by 100 and then add 20 to find the amount of pennies.
(2020)(100)+20= 202,000+20= 202,020 pennies.
Answer: 170.9 g
Explanation:
1) Balanced chemical equation:
Fe₂O₃(s) + 6 H₂C₂O₄ (aq) → 2Fe(C₂O₄)₃³⁻ + 3H₂O + 6H⁺(aq)
2) mole ratio:
1mol Fe₂O₃ : 6 mol H₂C₂O₄
3) number of moles of H₂C₂O₄ in the solution
M = n / V ⇒ n = MV = 0.800M × 0.800 liter = 6.40 moles
4) Porportionality
1mol Fe₂O₃ / 6 mol H₂C₂O₄ = x / 6.40 mol H₂C₂O₄
⇒ x = 1.07 mol Fe₂O₃
5) Convert 1.07 mol Fe₂O₃ to grams.
molar mass Fe₂O₃ = 159.69 g/mol
mass in grams = molaer mass × number of moles
mass in grams = 159.69 g/mol × 1.07 mol = 170.9 g