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Andru [333]
3 years ago
7

How do you find the mass number of an isotope?

Chemistry
1 answer:
solong [7]3 years ago
8 0

Answer:

The mass number of an isotope is the total number of protons and neutrons in an atomic nucleus. If you know that a nucleus has 6 protons and 6 neutrons, then its mass number is 12. If the nucleus has 6 protons and 7 neutrons, then its mass number is 13.

Explanation:

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hit the crown for me pls :)

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2 years ago
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Explanation:

Moles of metal,

=

4.86

⋅

g

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⋅

g

⋅

m

o

l

−

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=

0.200

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Moles of

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⋅

c

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×

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=

0.200

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Clearly, the acid is in deficiency ; i.e. it is the limiting reagent, because the equation above specifies that that 2 equiv of HCl are required for each equiv of metal.

So if

0.200

m

o

l

acid react, then (by the stoichiometry), 1/2 this quantity, i.e.

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of dihydrogen will evolve.

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0.100

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0.100

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o

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×

2.00

⋅

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⋅

m

o

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−

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=

?

?

g

.

If 1 mol dihydrogen gas occupies

24.5

d

m

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at room temperature and pressure, what will be the VOLUME of gas evolved?

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In order to keep the bench from conducting heat, Shane could build it out of _______.
lara31 [8.8K]

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

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~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ

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Answer:

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Explanation:

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