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Semenov [28]
2 years ago
13

I need help with stoichiometry

Chemistry
1 answer:
shutvik [7]2 years ago
4 0
Um I don’t know what stoichiometry is. So I can’t help I am sorry wish I could
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In your bathroom you leave the faucet dripping. If the faucet leaks 30.0 drops/minute, how much water will you waste after 3.00
Verizon [17]

First let's convert the minutes to hours (multiply minutes by 60 to get hours):

30 × 60 = 1,800 drops/hour

Now that you know how much drops there are per hour, you can multiply this answer by 3 to work out how many drops there are in 3 hours:

1,800 × 3 = 5,400 drops

We know that 5 drops is equal to 1 ml, so we can divide 5,400 by 5 to work out the amount of ml:

5,400 ÷ 5 = 1,080 ml

Therefore, your final answer is 1,080 millilitres (ml)

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8. Well-aerated soils have the _______________ smell of good soil.
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Answer:

9 is clay, silt, sand in that order

Explanation:

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You place a balloon in a closed chamber at STP. When the balloon doubles in size, what happens to the chamber pressure? A.) The
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This question may only be ansewered by frequent mattrrs
5 0
1 year ago
An analytical chemist is titrating 118.3 mL of a 0.3500 M solution of butanoic acid (HC3H7CO2) with a 0.400 M solution of KOH. T
TEA [102]

Answer:

pH = 12.33

Explanation:

Lets call HA = butanoic acid and A⁻ butanoic acid and its conjugate base butanoate respectively.

The titration reaction is

HA + KOH ---------------------------- A⁻ + H₂O + K⁺

number of moles of HA :   118.3 ml/1000ml/L x 0.3500 mol/L = 0.041 mol HA

number of  moles of OH  : 115.4 mL/1000ml/L x 0.400 mol/L  = 0.046 mol A⁻

therefore the weak acid will be completely consumed and what we have is  the unreacted strong base KOH which will drive the pH of the solution since the contribution of the conjugate base is negligible.

n unreacted KOH = 0.046 - 0.041 = 0.005 mol KOH

pOH = - log (KOH)

M KOH = 0.005 mol / (0.118.3 +0.1154)L = 0.0021 M

pOH = - log (0.0021) = 1.66

pH = 14 - 1.96 = 12.33

Note: It is a mistake to ask for the pH of the <u>acid solutio</u>n since as the above calculation shows we have a basic solution the moment all the acid has been consumed.

4 0
2 years ago
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