2 years ago

I need help please........

Chemistry

1 answer:

butalik [34]2 years ago

3 0

Answer:

Explanation:

image is formed due to reflected light rays and it is enlarged because image distance/ object distance = height of image/height of object

v>u so image is enlarged

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Zn-64 = 48.63%

sladkih [1.3K]

Answer:

A = 65.46 u

Explanation:

Given that,

The composition of zinc is as follows :

Zn-64 = 48.63%

Zn-66 = 27.90%

Zn-67 = 4.10%

Zn-68 = 18.75%

Zn-70 = .62%

We need to find the average atomic mass of the given element. It can be solved as follows :

$A=\dfrac{48.63\times 64+27.90\times 66+4.1\times 67+18.75\times 68+0.62\times 70}{100}\\A=65.46\ u$

So, the average atomic mass of zinc is 65.46 u.

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There are 6 oxygen atoms.

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