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taurus [48]
3 years ago
7

Sodium (na) has a total of 11 electrons. Ture False

Chemistry
2 answers:
Brums [2.3K]3 years ago
4 0

This is true. It has two electrons in shell one, 8 in shell two, and one in shell three.

Hope this helped
bixtya [17]3 years ago
4 0

i would say its true

from what i learned


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Answer: true

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Explain how deep ocean currents form.
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How many cu atoms are present in a piece of sterlingsilver jewelry weighing 33.24 g ? (sterling silver is a silver–copper alloy
emmasim [6.3K]

The mass of piece of sterling silver jewelry is 33.24 g. It contains 92.5% silver Ag by mass. Since, sterling silver is an alloy of Ag-Cu thus, percentage of Cu will be:

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Thus, mass of copper will be:

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Molar mass of Cu is 63.546 g/mol, thus, number of moles of Cu can be calculated as follows:

n=\frac{m}{M}

Here, m is mass and M is molar mass.

Putting the values,

n=\frac{2.493 g}{63.546 g/mol}=0.03923 mol

Now, in 1 mole of Cu there are 6.303\times 10^{23}atoms thus, in 0.03923 mol, number of Cu atoms will be:

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8 0
3 years ago
A solution is made by mixing equal masses of methanol, CH 4 O , and ethanol, C 2 H 6 O . Determine the mole fraction of each com
Fynjy0 [20]

Answer:

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Let the mass of CH_4O and C_2H_6O = x g

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The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

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Moles_{CH_4O}=\frac{x}{33.035}\ mol

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Thus,

Moles= \frac{x\ g}{46.07\ g/mol}

Moles_{C_2H_6O}=\frac{x}{46.07}\ mol

So, according to definition of mole fraction:

Mole\ fraction\ of\ CH_4O=\frac {n_{CH_4O}}{n_{CH_4O}+n_{C_2H_6O}}

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The estimate obtained from a sample of which size is likely to be closest to
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The answer is C, 85.

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