All categories

3 years ago

A gold bar contains 5 moles of gold. How many atoms of gold are present in the bar?

Chemistry

1 answer:

11111nata11111 [884]3 years ago

8 0

Answer:

= 3.01 x 10²³ atoms of gold (Au)

Explanation:

1 mole of any substance => 1 Avogadro's Number of particles = 6.02 x 10²³ particles.

∴ for 5 moles of gold atoms => 5 moles x 6.02 x 10²³ atoms/mole

= 3.01 x 10²³ atoms of gold (Au)

You might be interested in

Calculate the number of moles in the following: 2.8 X 10^24 atoms of Cl2

vova2212 [387]

Answer:

<h3>The answer is 4.65 moles</h3>

Explanation:

To find the number of moles given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

N = 2.8 × 10²⁴ atoms of Cl2

So we have

$n = \frac{2.8 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 4.65116279069...$

We have the final answer as

<h3>4.65 moles</h3>

Hope this helps you

7 0

3 years ago

What is the mass number of an isotope with an atomic number of 57 and that has 69 neutrons?

Karolina [17]

Answer:

mass number=126

Explanation:

57+69=126

7 0

2 years ago

By definition 12 grams of carbon-12 must contain how many atoms?

krek1111 [17]

It is defined as the amount of a substance that contains as many particles as there are atoms in 12 grams of pure carbon-12. So, 1 molecule contains 6.022×10^23 elementary entities of the substance.

Hope that helps

5 0

3 years ago

Would it be D....????<br> HELPPPPPP

AlekseyPX

Answer:

yes

Explanation:

6 0

3 years ago

Which would have a stronger attraction to the nucleus, the outer electrons of a carbon atom, or the outer electrons of an oxygen

Arte-miy333 [17]

Answer: Outer electrons because they revolve around the nucleus and can be multiple more than one

Explanation:

Hope it helps you you

7 0

2 years ago