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Marizza181 [45]
3 years ago
10

An atom with an atomic number of 12 and a mass number of 25 can best be described by which of these

Chemistry
2 answers:
meriva3 years ago
8 0

A. An atom that contains 12 protons


Maslowich3 years ago
7 0

A. An atom that contains 12 protons <u><em>and 13 neutrons.</em></u>

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two alcohols are used in our everyday lives - rubbing alcohol and ethylene glycol. In terms of molecular polarity why is rubbing
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https://www.edencsd.org/cms/lib/NY19000545/Centricity/Domain/38/Organic%20Answers.pdf

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List the colors of light in the visible spectrum in order<br> of increasing frequency.
masya89 [10]

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5 0
3 years ago
PLEASE ANSWER FAST
Elis [28]

First we need to calculate the number of moles of FeS_{2}:

number of moles = mass (grams) / molecular mass (g/mol)

number of moles of FeS_{2} = 198.2/120 = 1.65 moles

From the chemical reaction we deduce that:

if            4 moles of FeS_{2} produces 8 moles of SO_{2}

then  1.65 moles of FeS_{2} produces X moles of SO_{2}

X = (1.65×8)/4 = 3.3 moles of SO_{2}

Now we can calculate the mass of SO_{2}:

mass (grams) = number of moles × molecular mass (grams/mole)

mass of SO_{2} = 3.3×64 = 211.2 g

7 0
3 years ago
Na-23 has 12 neutrons. What is it’s atomic number?
erastovalidia [21]

Answer:

11

Explanation:

The atomic number = number of protons. The mass number (23) = sum of number of neutrons and protons. Since you know the mass number is 23 and it has 12 neutrons, 23-12 gives you 11 protons, so its atomic number is 11.

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6 0
2 years ago
Read 2 more answers
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