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grandymaker [24]
3 years ago
11

Which balance is the centigram balance?1) A2) B

Chemistry
2 answers:
Viefleur [7K]3 years ago
8 0

Answer: B

Explanation: 1 gram equals to 100 centigrams. We can also say that, 1 centigram equals to 0.01 gram.

From above centigram to gram conversion factor, there are two decimal places in 0.01 gram. So, a centigram balance is the one that could read the mass of a matter(object) to two decimal places.

Balance A can only read to one decimal place where as balance B can read the mass up to two decimal places.

Hence, balance B is the centigram balance.

viva [34]3 years ago
6 0

It is B balance, because it has a 0,01 g divisions scale. The minimun division in A balance is only 0,1 g, i.e, decigram measurement.

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Answer:

I would say False.

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3 years ago
calculate how many milliliters of 0.142 M NaOH are needed to completely neutralize 21.4 mL of 0.294 M H2C4H4O6.
Flura [38]

Answer:

The answer to your question is 88.7 ml

Explanation:

Data

Volume = ?

Concentration of NaOH = 0.142 M

Volume of H₂C₄H₄O₆ = 21.4 ml

Concentration of H₂C₄H₄O₆ = 0.294 M

Balanced chemical reaction

               2 NaOH + H₂C₄H₄O₆  ⇒  Na₂C₄H₄O₆  +  2H₂O

1.- Calculate the moles of H₂C₄H₄O₆

Molarity = moles/volume

Solve for moles

moles = Molarity x volume

Substitution

moles = 0.294 x 21.4/1000

Result

moles = 0.0063

2.- Use proportions to calculate the moles of NaOH

              2 moles of NaOH ------------------ 1 moles of H₂C₄H₄O₆

               x                           ------------------ 0.0063 moles

               x = (0.0063 x 2) / 1

               x = 0.0126 moles of NaOH

3.- Calculate the volume  of NaOH

Molarity = moles / volume

Solve for volume

Volume = moles/Molarity

Substitution

Volume = 0.0126/0.142

Result

Volume = 0.088 L or 88.7 ml

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3 years ago
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4 years ago
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4. Ensure that you do not litter on the ground and do proper disposal of garbage.

5. Buy biodegradable products.

6. Do organic gardening and eat organic food that will be grown without the use of pesticides.

7. Create dumping ground away from residential areas.

I hope it helps u

7 0
2 years ago
"A base is a substance that produce OH-ions." Which definition of a base is this?
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Answer:

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Explanation:

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3 years ago
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