Determine the percent composition from the following analytical data:

1 answer:

8 0

The chemical name of the table salt is sodium chloride with a chemical symbol of NaCl. If out of 6.1 g of table salt, 2.6 g of Cl was form, this means that 3.5g is Na. Then the percent composition of table salt is,
Na = (3.5 g/ 6.1)x 100% = 57.38%
Cl = (2.6 g /6.1) x 100% = 42.62%
Thus, the percent composition of table salt is 57.38% and 42.62% of Na and Cl, respectively.

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What is the relative atomic mass of an element

Gennadij [26K]

Answer:

20.2 amu.

Explanation:

Let A represent isotope ²⁰X

Let B represent isotope ²²X

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

For Isotope A (²⁰X):

Mass of A = 20

Abundance (A%) = 90%

For Isotope B (²²X):

Mass of B = 22

Abundance (A%) = 10%

Relative atomic mass (RAM) =?

The relative atomic mass (RAM) of the element can be obtained as follow:

RAM = [(Mass of A × A%)/100] + [(Mass of B × B%)/100]

RAM = [(20 × 90)/100] + [(22 × 10)/100]

RAM = 18 + 2.2

RAM = 20.2 amu

Thus, relative atomic mass (RAM) of the element is 20.2 amu

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3 years ago

Calculate the number of molecules in 7 moles of oxygen

Alexxandr [17]

Answer:

4.21

Explanation:

use Avogadro's number

6.023 x 10^23

multiply this by 7 because you want to find 7 moles :

6.023 x 10^23 x 7 = 4.21

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3 years ago

Glycogen ________. Glycogen ________. forms the regulatory molecules known as enzymes serves as a structural component of human

jasenka [17]

Answer:

Glycogen in an important storage polysaccharide found in animal tissues.

Explanation:

Full question:

Glycogen ________

A) forms the regulatory molecules known as enzymes

B) serves as a structural component of human cells

C) helps to protect vital organs from damage

D) is an important storage polysaccharide found in animal tissues

E) contains the genetic information found in cells

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