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Fynjy0 [20]
3 years ago
7

A 1.0 M H2S solution has a pH = 3.75 at equilibrium. What is the value of Ka?

Chemistry
2 answers:
MrRa [10]3 years ago
7 0
The answer is 3.16*10-8
Lelechka [254]3 years ago
6 0
The answer is A, for help I watched some khan academy vids, they're very helpful
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If 4500 g of Zr metal is reacted with 1.5 x 104 g of water what is the limiting reactant?
PIT_PIT [208]

Answer:

Zr

Explanation:

The balance equation of the reaction is:

Zr + 2 H₂O ⇒ ZrO₂ + 2 H₂

Being:

  • Zr: 91 g/mole
  • H: 1 g/mole
  • O: 16 g/mole

the molar mass of the reactants participating in the reaction are:

  • Zr: 91 g/mole
  • H₂O: 2*1 g/mole + 16 g/mole= 18 g/mole

If by stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction) they react in moles:

  • Zr: 1 mole
  • H₂O: 2 moles

then by stoichiometry the following quantity of mass react:

  • Zr: 1 mole*91 g/mole= 91 g
  • H₂O: 2 moles*18 g/mole=  36 g

Now the following rule of three applies: if 91 g of Zr react with 36 g of H₂O, 4500 g of Zr with how much mass of H₂O would it react?

mass of H_{2} O=\frac{4500 grams of Zr*36 grams of H_{2}O }{91 grams of Zr}

mass of H₂O= 1,780 grams

But 1780 grams of H₂0 are not available, 1.5 * 10⁴(15,000) grams are available. Since it has more mass than it needs to react with 4500 grams of Zr, Zr zirconia will be the limiting reagent.

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3 years ago
What is the scientific notation of 696,000 kilometers
Misha Larkins [42]

Hello There!

The Answer Is In Image Provided.

Your Unit Is Still Kilometers

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An alloy is the solid solution of a metal or non-metal dissolved in a metal.
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Because waves carry energy,some waves are used for communication,eg radio and television waves and mobile telephone signals.

Explanation:

i hope it helps

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