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Natalija [7]
3 years ago
9

How many moles of gold are equivalent to 1.204 × 1024 atoms? 0.2 0.5 2 5

Chemistry
2 answers:
Thepotemich [5.8K]3 years ago
6 0

Answer:

Hey there!

The answer is 2 moles of gold.

2 moles are equal to 1.204 × 1024 atoms.

Hope this helps :)

NeTakaya3 years ago
5 0

Answer:

c

Explanation:

How many moles of gold are equivalent to 1.204 × 1024 atoms?

0.2

0.5

2

5

C) 2 Is the correct answer, I took the test and it was correct.

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I didn’t study for this lol if your answer correct I’ll mark ur answer brainliest
kotykmax [81]

Answer:

3

Explanation:

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In the metric system kilo is an abbreviation for 10,000
SCORPION-xisa [38]

Answer:

10 kilo

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5 0
3 years ago
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The substance which does the dissolving in a solution is
oksano4ka [1.4K]

Answer:

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3 years ago
If 495 milliliters of carbon dioxide at 25°C and 101.3 kilopascals reacts with excess water, what is the theoretical yield of ca
postnew [5]

Answer:- 1.24 g

Solution:- The balanced equation for the formation of carbonic acid by the reaction of carbon dioxide with water is:

CO_2+H_2O\rightarrow H_2CO_3

From balanced equation, there is 1:1 mol ratio between carbon dioxide and carbonic acid. So, moles of carbonic acid will be equal to the moles of carbon dioxide used.

Moles of carbon dioxide can be calculated using ideal gas law equation as it's volume, temperature and pressure are given.

we need to convert mL to L, degree C to kelvin and kilopascals to atm.

495mL(\frac{1L}{1000mL})  = 0.495 L

25 + 273 = 298 K

101.3kPa(\frac{1atm}{101.3kPa)})

= 1 atm

Ideal gas law equation is:

PV = nRT

We want to find out the n, so let's rearrange this:

n=\frac{PV}{RT}

R is the universal gas constant and it's value is \frac{0.0821atm.L}{mol.K} .

Let's pug in the values in the equation and solve it for n.

n=\frac{1*0.495}{0.0821*298}

n = 0.02 mol

To convert the moles to grams we multiply the moles by the molar mass of carbonic acid.

Molar mass of carbonic acid = 2(1.008)+12.01+3(16.00)

= 2.016+12.01+48.00

= 62.03 gram per mol (rounded to two decimal places)

Let's multiply the moles by molar mass:

0.02mol(\frac{62.03g}{mol})

= 1.24 g

So, the theoretical yield of carbonic acid is 1.24 g.


6 0
3 years ago
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