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VikaD [51]
3 years ago
14

Given 1kg=2.20 lbs, how many kilograms are in 125 lbs? (Metric conversion)

Chemistry
1 answer:
Nadya [2.5K]3 years ago
7 0

Answer:

56.82 Kg

Explanation:

Given data:

1 Kg = 2.20 lbs

Number of kilogram in 125 lbs = ?

Solution:

lbs is used for pound. lb is abbreviation of libra. It is Latin word meaning balance.

Both kilogram and pounds are units of mass. Pound is smaller unit than kilogram.

one Kg = 2.20 lbs

Number of kg in 125 lbs:

125 lbs × 1 Kg/2.20 lbs

125 lbs.Kg/2.20 lbs

56.82 Kg

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Which of the following represent impossible combinations of n and I? (a) 1p, (b) 4s, (c) 5f, (d) 2d 6.61
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Explanation:

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So, if n = 1, l can only be 0; if n = 2, l can be either 0 or 1; if n = 2, l can be either 0, 1 or 2.

On the other hand, the shape of the orbitals is also representd by a letter. then there is a unique relation between the letter that represents the orbital and the angular quantum number which is:

letter       l number

s               0

p               1

d               2

f                3

The previous information is summarized in the next table:

n    possible l numbers          

1          0                                          

2         0, 1                                        

3         0, 1, 2                                    

4         0, 1, 2, 3                              

5        0, 1, 2, 3, 4

6        0, 1, 2, 3, 4, 5

7        0, 1, 2, 3, 4, 5, 6

As per the choices given in the question you have:

<u>(a) 1 p</u> is not possible because when n = 1 the only l number is 0 and it is an s orbital, but p ⇒ l = 1. Thus, this is a correct choice.

<u>(b) 4s</u> is possible since n = 4 permits l to be 0, 1, 2, and 3.

<u>(c) 5f </u>is possible since n = 5 permits l to be 0, 1, 2, 3, and 4.

<u>(d) 2d</u> is impossible since n = 2 permits l to be 0, and 1, but d ⇒ l = 2. Thus, this is other right choice.

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