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salantis [7]
2 years ago
9

What coefficient is needed to balance the reaction

Chemistry
1 answer:
tensa zangetsu [6.8K]2 years ago
5 0

Answer:

OD. 2HCl

Explanation:

A balanced equation needs the equal # of each element on BOTH sides.

By putting a 2 in front of HCl you now have 2 hydrogens on both sides and 2 chlorines. The Ca and CO3 are already balanced.

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Hypotheisis is just like an initial building block for a building. The true statements about hypothesis among the given are-

  • First guess- hypothesis is a proposed explanation for something which is observed. Thus the explanation is just a guess and not a proved one.
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What is physical weathering NOT caused by? (pls i really need help with this!!)
Anarel [89]

Answer:

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What is Cytokine Release Syndrome (CRS)
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4 0
3 years ago
What is the molarity of the potassium hydroxide if 25.25 mL of KOH is required to neutralize 0.500 g of oxalic acid, H2C2O4? H2C
Greeley [361]

Answer:

0.444 mol/L

Explanation:

First step is to find the number of moles of oxalic acid.

n(oxalic acid) = \frac{0.5g}{90.03 g/mol} = 5.5537*10^{-3} mol\\

Now use the molar ratio to find how many moles of NaOH would be required to neutralize 5.5537*10^{-3} mol\\ of oxalic acid.

n(oxalic acid): n(potassium hydroxide)

         1           :            2                  (we get this from the balanced equation)

5.5537*10^{-3} mol\\ : x

x = 0.0111 mol

Now to calculate what concentration of KOH that would be in 25 mL of water:

c = \frac{number of moles}{volume} = \frac{0.0111}{0.025} = 0.444 mol/L

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3 years ago
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krok68 [10]

Answer:

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