All categories

3 years ago

Calculate the average atomic mass for element X

Chemistry

1 answer:

zzz [600]3 years ago

7 0

Answer:

39.02

Explanation:

From the question given above, the following data were obtained:

Isotope A:

Mass of A = 38

Abundance of A (A%) = 9.67%

Isotope B:

Mass of B = 39

Abundance of B (B%) = 78.68%

Isotope C:

Mass of C = 40

Abundance of C (C%) = 11.34%

Isotope D:

Mass of D = 41

Abundance of D (D%) = 0.31%

Average atomic mass of X =?

The average atomic mass of X can be obtained as follow:

Average = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100] + [(Mass of D × D%)/100]

= [(38 × 9.67)/100] + [(39 × 78.68)/100] + [(40 × 11.34)/100] + [(41 × 0.31)/100]

= 3.6746 + 30.6852 + 4.536 + 0.1271

= 30.02

Thus, the average atomic mass of X is 39.02

You might be interested in

Show the reaction sequences that explain these transformations

sineoko [7]

I don't know because your question is very unclear

6 0

3 years ago

What is the preferable form of carbohydrate for eating?

garik1379 [7]

Carbs build muscle and muscle is good

6 0

3 years ago

Calculate the number of moles of iodine in 7.68×10^25 molecules of I2

Dmitrij [34]

Answer:

<h2>127.57 moles</h2>

Explanation:

To find the number of moles in a substance 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 we have

$n = \frac{7.68 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 127.574750...$

We have the final answer as

<h3>127.57 moles</h3>

Hope this helps you

4 0

3 years ago

Which of the following characteristics do all of the outer planets have in common? A. They lack moons. B. They are small and den

Bogdan [553]

I think the correct answer from the choices listed above is option D. Outer planets are mostly made up of gases and are huge in size. These gases are hydrogen and helium. <span>These outer planets are Saturn, Jupiter, Uranus, and Neptune. Hope this answers the question.</span>

8 0

3 years ago

Read 2 more answers

What type of forces which exist in liquid hydrogen fluoride ?

Misha Larkins [42]

Answer:

H-F is a polar covalent molecule in which dipole-dipole interactions exists

7 0

2 years ago