Answered

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Question 1 (4 points)
You are given a Stoichiometry word problem with a chemical reaction with reactants and products given below:
2A + B2 --> 2AB
You must find the mass of AB formed with 4 moles of B2.
Q: Which of the following information do you need to have in the correct order to solve the problem?
1. to cancel out moles of B2, you must multiply with a factor that have moles of B2 at the denominator and
moles of AB in the numerator
2. Find mole ratios of B2 and AB to obtain conversion factors
3. to cancel moles of AB, you must multiply with a factor that has 1 mole of AB in the denominator and molar
mass of AB on the numerator.
4. Start solving with the given information (moles of B2) first
5. Balance the equation

Sagot :

The correct answer is b
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