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erik [133]
3 years ago
14

Help me out!! If its right i give you brainliest<3 Also have a great day

Chemistry
2 answers:
Hitman42 [59]3 years ago
6 0
I think its D or it can also be C
DerKrebs [107]3 years ago
3 0

Answer: the answer is D

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Calculate the number of moles in 8 g of water.
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Answer:

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2 years ago
A 0.2722 g sample of a pure carbonate, X n CO 3 ( s ) , was dissolved in 50.0 mL of 0.1200 M HCl ( aq ) . The excess HCl ( aq )
Alex73 [517]

Answer:

0.00369 moles of HCl react with carbonate.

Explanation:

Number of moles of HCl present initially = \frac{0.1200}{1000}\times 50.0 moles = 0.00600 moles

Neutralization reaction (back titration): NaOH+HCl\rightarrow NaCl+H_{2}O

According to above equation, 1 mol of NaOH reacts with 1 mol of 1 mol of HCl.

So, excess number of moles of HCl present = number of NaOH added for back titration = \frac{0.0980}{1000}\times 23.60 moles = 0.00231 moles

So, mole of HCl reacts with carbonate = (Number of moles of HCl present initially) - (excess number of moles of HCl present) = (0.00600 - 0.00231) moles = 0.00369 moles

Hence, 0.00369 moles of HCl react with carbonate.

3 0
3 years ago
Someone help 6th grade science i will give brainliest
patriot [66]
I believe the answer is C
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3 years ago
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