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maxi12312345
22.07.2019 •
Chemistry
Na chemical reaction, exactly 2 mol of substance a react to produce exactly 3 mol of substance b. 2a⟶3b how many molecules of substance b are produced when 27.6 g of substance a reacts? the molar mass of substance a is 27.8 g/mol. step 1: convert the mass of a to moles. moles of a: mol step 2: convert the number of moles of a to the number of moles of b. moles of b: mol step 3: convert the number of moles of b to molecules of b. molecules of b:
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Ответ:
Answers:
Step 1: Convert the mass of A to moles. moles of A: 0.993 mol Step 2: Convert the number of moles of A to the number of moles of B. moles of B: 1.49 mol Step 3: Convert the number of moles of B to molecules of B. molecules of B: 8.97 × 10²³ moleculesExplanation:
1) Chemical equation (given):
2A⟶3B2) Follow the given steps:
Step 1: Convert the mass of A to moles.
moles of A:
n = mass in grams / molar massn = 27.6 g / 27.8 g/mol = 0.993 mol of AStep 2: Convert the number of moles of A to the number of moles of B.
Stoichiometric ratio:2 mol A : 3 mol B
Proportion:2 mol A / 3 mol B = 0.993 mol A / x
⇒ x = 0.993 mol A × 3 mol B / 2 mol A = 1.49 mol of B
Step 3: Convert the number of moles of B to molecules of B.
Avogadro's number: 6.022 × 10²³ molecules / mol1.49 mol × 6.022 × 10²³ molecules / mol = 8.97 × 10²³ molecules of B.Ответ:
y=1/2x
Yes, this is linear