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larisa [96]
3 years ago
9

How to answer all these questions?

Chemistry
1 answer:
Fudgin [204]3 years ago
8 0
You have to do it to see the results
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Which chemical formula corresponds to this structural formula?
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I think the answer is choice D
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How many meters are present in the 12.45 miles? Please show your work, and report your answer with the correct number of signifi
MatroZZZ [7]

Explanation:

We know that,

1 mile = 1609.34 m

We need to find how many meters are present in the 12.45 miles. To find it use unitary method as follows :

12.45 mile = 1609.34 × 12.45

12.45 mile=20036.283 meters

or

12.45\ mile=2.0036\times 10^4\ m

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3 years ago
A sample of 250 g of water are heated from 40°C to 121°C, calculate the amount of heat energy absorbed.
Marysya12 [62]

Answer:

the anwser isn't in the choices

Explanation:

H=MC(change of temp.)

M=mass of water=250g

C=specific heat of water = 4.186 j/g

change in temperature is 121-40= 81

H= 250x4.186x81=84766.5J

7 0
3 years ago
Which representative element has the largest atomic radius ?
Vikki [24]

Answer:

francium

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the atomic radius increases from top to bottom in a group, and decreases from left to right across a period.

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