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3 years ago

How do you convert from atoms to moles

Chemistry

2 answers:

zvonat [6]3 years ago

6 0

To convert from atoms to moles, divide the atom amount by Avogadro's number (or multiply by its reciprocal).

pav-90 [236]3 years ago

4 0

Answer: use the following conversion factor:

1 mole of the substance = 6.022x10²³ atoms of the substance

Explanation: The Avogadro's number per unit number of moles.

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The CRC Handbook, a large reference book of chemical and physical data, lists two isotopes of indium (). The atomic mass of 4.28

ivanzaharov [21]

Answer: The mass of second isotope of indium is 114.904 amu

Explanation:

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

.....(1)

Let the mass of isotope 2 of indium be 'x'

For isotope 1:

Mass of isotope 1 = 112.904 amu

Percentage abundance of isotope 1 = 4.28 %

Fractional abundance of isotope 1 = 0.0428

For isotope 2:

Mass of isotope 2 = x amu

Percentage abundance of isotope 2 = [100 - 4.28] = 95.72 %

Fractional abundance of isotope 2 = 0.9572

Average atomic mass of indium = 114.818 amu

Putting values in equation 1, we get:

$114.818=[(112.904\times 0.0428)+(x\times 0.9572)]\\\\x=114.904amu$

Hence, the mass of second isotope of indium is 114.904 amu

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3 years ago

What is the order of decreasing reactivity of these 4 metals?

Arturiano [62]

Answer:

Ca, Mg, Zn, Cu

Explanation:

Refer to the Reactivity Series where each metal is more reactive than others.

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3 years ago

Elements in group 1A all:

My name is Ann [436]

Answer:

The answer to your question is below

Explanation:

Elements in group 1A all:

a. gain 1 electron This option is wrong, elements in group 1A loses one electron.

b. lose 1 electron This option is right.

c. are non-metals This option is incorrect, elements in group IA, are metals.

d. have 2 energy levels This option is incorrect, only one element in each group has 2 energy levels.

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Sati [7]

Change in their environment

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Easy one giving brainly if correct + detailed

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좋은 하루 되시고 도움이 되셨길 바랍니

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3 years ago