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Sliva [168]
4 years ago
5

Give the number of significant figures: 369,132,000 sec A. 0 B. 6 C. 9

Chemistry
2 answers:
Darya [45]4 years ago
5 0

A. 6

is the answer for this problem

arlik [135]4 years ago
3 0

Answer:

A. 6

Explanation:

369 132 000 s

The important rules are

• Digits other than zero are significant

• Trailing zeroes before the decimal point are not significant

The decimal point is after the last zero, so the three zeroes are not significant,

Thus, the underlined digits in <u>369</u> <u>132 </u>000 are significant.

There are six significant figures in the measurement.

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When 1.82 mole of HCL reacts with excess MnO2, how many moles of Cl2 form?
liubo4ka [24]
The balanced reaction is:

MnO2<span>(s) + 4HCl(aq) → Cl2(g) + MnCl2(aq) + 2H2O(l)
</span>
We are given the amount of hydrochloric acid to be used for the reaction. This will be the starting point for the calculations.

1.82 mol HCl ( 1 mol Cl2 / 4 mol HCl) = 0.46 mol Cl2

Therefore, 0.46 mol of chlorine gas is produced for the reaction of hydrochloric acid and manganese oxide.
6 0
4 years ago
How is the separation of dna like a zipper
Sedbober [7]

The two strands must be separated like the two sides of a zipper, by breaking the weak hydrogen bonds that link the paired bases.

<u>Explanation:</u>

  • A double helix structure formed by two polypeptide chains is separated like the two sides of a zipper. A zipper is formed by breaking the weak hydrogen bonds that link the paired bases. During replication, an enzyme "Helicase" travels down the DNA and splits the chain and it forms 2 separate strands.
  • The two DNA strand which has the same sequence must be separated like the two sides of a zipper by breaking weak hydrogen bases. During base pair-rule, the strand are unzipped and each strands is copied.

     

3 0
3 years ago
Two children on a seesaw are able to balance perfectly while on Earth.would they still be balanced if you saw was brought to the
Setler [38]

Answer:

C

Explanation:

Because on the moon you are basically weightless and your mass would stay the same

3 0
3 years ago
A Wisconsin farmer taps a maple tree and collects 200 liters of sap. He determines the sucrose (C12H2011) concentration to be 0.
Minchanka [31]

Answer:

6.0 L

Explanation:

Use the dilution equation M1V1 = M2V2

M1 = 0.075 M

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M2 = 2.5 M

V2 = ?

Solve for V2 --> V2 = M1V1/M2

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4 0
3 years ago
Please help-<br> thank you-
Flauer [41]
Dang that’s crazy.. Goodluck ..
4 0
3 years ago
Read 2 more answers
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