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umka21 [38]
3 years ago
7

Can someone help me understand how to solve mole problems in chemistry?

Chemistry
2 answers:
AURORKA [14]3 years ago
5 0
I can if you give man example I'll show you how to do it.
stepladder [879]3 years ago
5 0
<span>I start the reaction below with 1.5g of Al, how many moles of Cl can I make" (Al + Cl2 ➡ NaCl)

First thing to do is find out what the amu of Al is.
You can find that on a periodic table. 26.98grams per mole
1.5g Al x </span>\frac{1 mole Al}{26.98g Al} = <span>0.05559673832 = 0.056 moles of Al
Now ratio the moles.
0.056 moles Al x </span>\frac{1 mole Cl}{1 mole Al} = 0.056 moles of Cl
The answer is 0.056 moles of Cl
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<span>Answer: The HCl and KOH will react until one or the other is gone. As you have a larger volume of an equal concentration of HCl, the KOH will go first. moles HCl = 0.04000 L * 0.100 M = 0.00400 moles moles KOH = 0.02500 L * 0.100 M = 0.00250 moles moles HCl left = 0.00400 - 0.00250 = 0.00150 moles Your total volume is now 65.00 mL, so the [HCl] = 0.00150 moles / 0.06500 L = 0.0231 M = [H+] pH = -log [H+] = -log (0.0231) = 1.64</span>
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3 years ago
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Answer:

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7 0
2 years ago
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Fe2O3+2Al=Al2O3+2Fe
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We determine the limiting reactant by using the moles present in the equation and the actual moles.
According to equation, ratio of Fe₂O₃ : Al = 1 : 2
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