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Ilia_Sergeevich [38]
3 years ago
14

A marathon is a race that commemorates the run made by a Greek soldier, Pheidippides, that took place in August 490 BC. The sold

ier ran 26.2 mi. How many kilometers did he run?
Chemistry
2 answers:
Vlad1618 [11]3 years ago
7 0
The correct answer is 42. All marathon races in Europe are 42km long, which is 26.2 miles for those who use miles.
timofeeve [1]3 years ago
5 0

the correct answer to this problem is <u>41.9 </u> to be exact

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Can someone tell me how to identify the number of significant figures?
igor_vitrenko [27]

Answer:

Non-zero digits are always significant.

Any zeros between two significant digits are significant.

A final zero or trailing zeros in the decimal portion ONLY are significant. If a number ends in zeros to the right of the decimal point, those zeros are significant.

Explanation:

1.138 has 4 significant figures, which are 1, 1, 3 and 8. The numbers after the decimal point are decimals and are significant figures.

8 0
3 years ago
What are groups of two or more atoms bonded together that function as a single unit?
ASHA 777 [7]
The answer is molecules
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3 years ago
What happens when: sulphuric acid reacts with zinc.​
KonstantinChe [14]

Answer:

hope it helps.

Explanation:

Zinc metal dissolves slowly in dilute sulphuric acid to form solutions containing the aquated Zn(II) ion together with hydrogen gas, H2.

3 0
2 years ago
Please help!!!!
stealth61 [152]

Answer:

Cells are extremely small.

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As Mendel describes in this story, cells are so small they cannot normally be seen with the naked eye. ... The total organism remains the same throughout this process, and (usually) has a longer time on earth than any one of its cells.

3 0
2 years ago
Consider the following intermediate chemical equations.
vfiekz [6]

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-250.3kJ

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(2) 4PCl₅(g) → P₄(s) + 10Cl₂  ΔH₂ = 3438kJ

The sum of (1) + (2) is:

4PCl₅(g) → 4PCl₃(g) + 4 Cl₂ ΔH = -4439kJ + 3438kJ = -1001kJ

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8 0
3 years ago
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