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arsen [322]
3 years ago
15

Round the following number to 2 significant figures: 94.5

Chemistry
1 answer:
iVinArrow [24]3 years ago
3 0

Answer:

95

Explanation:

94.5 contains 3 significant figures so to round it to just two, we can just round the number to the nearest whole number. Remember that we round up if we have 5 and up then we would round down if we have 4 and below.

94.5 → 95

Best of Luck!

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Name and write the structures of all isomers of the propyl and butyl alkyl groups.
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Answer:

Explanation:

Propyl and butyl groups are the alkyl groups formed by replacing the one hydrogen atom from their corresponding alkanes.

Propyl is formed from propane and has n-propyl and isopropyl alkyl isomers.

Butyl is from butane and has n-butyl, isobutyl , sec-butyl and tertiary butyl alkyl isomers.

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What is the concentration of a solution of HCl in which a 10.0 mL sample of acid required 50.0 mL of 0.150 M NaOH for neutraliza
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Answer:

The answer is 0.75M HCl

Explanation:

To calculate the concentration of 10 ml of HCl that would be required to neutralize 50.0 mL of 0.150 M NaOH, we use the formula:

To calculate the concentration of 10 ml of HCl that would be required to neutralize 50.0 mL of 0.150 M NaOH, we use the formula:

C1V1 = C2V2

C1 = concentration of acid

C2 = concentration of base

V1 = volume of acid

V2 = volume of base

From the information supplied in the question:

concentration of acid (HCl) is the unknown

volume of acid (HCl) = 10ml

concentration of base (NaOH) = 0.15M

volume of base (NaOH) = 50ml

C1 x 10ml = 0.15M x 50ml

C1 x 10 = 7.5

divide both side by 10

C1 = 0.75M

concentration of acid (HCl) is 0.75M

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