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How many grams are in 1.2 x 1024 atoms of sodium?

jarptica [38.1K]

Answer:

46 g

Explanation:

First we convert 1.2 x 10²⁴ atoms of sodium into moles, using Avogadro's number:

1.2x10²⁴ atoms ÷ 6.023x10²³ atoms/mol = 2.0 mol

Then we convert 2.0 moles of sodium into grams, using sodium's molar mass:

2.0 mol Na * 23 g/mol = 46 g

Thus, there are 46 grams in 1.2x10²⁴ atoms of sodium.

3 0

3 years ago

Which of the following would diffuse through a cell membrane the most easily?

ZanzabumX [31]

You didn’t give us the options???

anyways: Water diffusion is called osmosis. Oxygen is a small molecule and it's nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.

8 0

3 years ago

Read 2 more answers

Sarah is writing a paper explaining protein formation. Choose the correct way to complete each sentence.

Amanda [17]

Answer :

Amino acids join by forming (1) peptide bonds. Water is released.

The chains of amino acids vary according to their (2) side chains, which each have differing makeup.

These chains determine the protein’s structure and they fold to create a unique (3) third-dimensional shape.

Explanation :

Amino acid : The amino acids are the building blocks of protein. Amino acids are the compound which consist both amine $(-NH_2)$ and carboxylic $(-COOH)$ groups along with the side chains. In the protein, many amino acids are linked by the peptide bonds.

Th peptide bonds are formed by the combining of amino group of one amino acid to the carboxylic group of another amino acid by releasing of water.

Some examples of amino acids are glycine, lysine, alanine, etc.

Peptide bond formation image is shown below.

In the image 'R' can be contained by different groups like hydrogen, methyl, phenyl, etc