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3 years ago

What % of table salt (NaCl) is sodium?

Chemistry

2 answers:

laila [671]3 years ago

7 0

I think the answer is 39%!

Irina18 [472]3 years ago

6 0

Answer:

I think it's 39%

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Hugh wrote the properties of physical and chemical weathering in the table shown.

Talja [164]

Answer:

I am sure that the C one is correct

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3 years ago

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Convert 12.3 centimeters to meters.<br> (1 m = 100 cm)

Contact [7]

0.123

Explanation:

That’s the answer

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2 years ago

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The enzyme, carbonic anhydrase, is a large zinc-containing protein with a molar mass of 3.00 x10^4 g/mol. Zn is 0.218% by mass o

tia_tia [17]

The mathematical expression for mass percent is given by:

$Mass percent = \frac{mass of the compound}{molar mass of the compound}\times 100$

Put the values,

$0.218 percent of zinc = \frac{mass of zinc}{3.00 \times 10^{4} g/mol}\times 100$

mass of zinc = $0.218 \times (3\times 100) g$

= $0.654 \times 100 g$ or 65.4 g

Now, number of moles of zinc = $\frac{given mass in g}{molar mass of zinc}$

= $\frac{65.4 g}{65.38 g/mol}$

= 1.00 mole

Number of atoms of zinc is calculated by the Avogadro number.

Now, according to mole concept

$6.022\times 10^{23}$ molecules of enzyme consists of $6.022\times 10^{23}$ atoms of zinc

So, 1 molecule of enzyme contains = $\frac{6.022\times 10^{23}atoms of zinc}{6.022\times 10^{23} }$

= 1 atom of zinc.

Hence, every carbonic anhydrase molecule consists of 1 atom of zinc.

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3 years ago

Which term describes this reaction?

castortr0y [4]

Answer:Biopolymer: the monomeric amino acids are linked through an

amide bond (the carboxylic acids of one AA with the α-amino

group of a second)

Explanation:

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2 years ago

Which statement about the half life of a radioactive sample is true?

wariber [46]

The correct answer is B. it measures the tendency of a radioisotope to decay radioactively.

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3 years ago

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