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3 years ago

How many atoms are in 12 moles of sodium?

Chemistry

1 answer:

yawa3891 [41]3 years ago

7 0

Answer: There are 1.20 x 1024 atoms of sodium in 2 moles

Explanation:

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When a popsicle melts, the particles

lina2011 [118]

Answer:

I think the answer is b but I could be wrong. but I believe the answer is b.

Explanation:

because As the popsicle melts, it goes through a change of state or phase change. A change of state when a substance changes physical form but not in molecule make up. The molecules do not change into something different they just gain or lose energy and movement.

7 0

3 years ago

If 6.75 g of NaOH are dissolved in 50.00 g of water and the temperature increases

exis [7]

Answer: THE STANDARD HEAT OF SOLUTION OF SODIUM HYDROXIDE IN WATER IS -7.68 KJ PER MOLE.

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3 years ago

Iron (Fe) has three isotopes. Calculate the average atomic mass of the element Fe using the following data: Isotope atomic mass

Maksim231197 [3]

Answer:

Average atomic mass = 55.83 amu

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})+(\frac {\%\ of\ the\ third\ isotope}{100}\times {Mass\ of\ the\ third\ isotope})$

Given that:

For first isotope, Fe-54:

% = 6 %

Mass = 53.94 amu

For second isotope, Fe-56:

% = 92 %

Mass = 55.93 amu

For third isotope, Fe-57:

% = 2 %

Mass = 56.94 amu

Thus,

$Average\ atomic\ mass=\frac{6}{100}\times {53.94}+\frac{92}{100}\times {55.93}+\frac{2}{100}\times {56.94}$

<u>Average atomic mass = 55.83 amu</u>

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3 years ago

Which quantity is used to generate the error bars on a graph?

RoseWind [281]

<span>range I believe, you take the difference between the heights of your theoretical and actual outcomes</span>

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3 years ago

If 41.38 g of sodium combines with

Arlecino [84]

I think it is 3 because Sus wiw word if rn

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3 years ago