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3 years ago

What are the coefficients needed to balance this chemical reaction to show that matter is conserved? fe + cl2 → fecl3

SAT

1 answer:

motikmotik3 years ago

5 0

Let a, b, and c be the coefficients in the balanced reaction:

a Fe + b Cl₂ → c FeCl₃

Count the atoms that show up among the reactants and products. They should be equal on both sides:

Fe : a = c

Cl : 2b = 3c

Let c = 2. Then a = 2 and 2b = 6, so b = 3.

Then the balanced reaction is

2 Fe + 3 Cl₂ → 2 FeCl₃

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3 years ago

Suppose the profit maximizing output is 160,000 smart rackets

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2 years ago

how many milliliters of 0.200 m nh₄oh are needed to react with 12.0 ml of 0.550 m fecl₃? fecl₃+ 3nh₄oh → fe(oh)₃ + 3nh₄cl

siniylev [52]

You're starting with

(12.0 mL) (0.550 M) = (0.0120 L) (0.550 M) = 0.00660 mol

of FeCl₃.

For every mole of FeCl₃ in the balanced reaction, you need 3 moles of NH₄OH, so you need a minimum 0.0198 mol NH₄OH per mole FeCl₃.

Then the requisite volume of NH₄OH solution needed is <em>V</em> such that

(0.0198 mol) / <em>V</em> = 0.200 M

Solve for <em>V</em> to get

<em>V</em> = (0.0198 mol) / (0.200 M) = 0.0990 L = 99 mL

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3 years ago