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GuDViN [60]
3 years ago
9

How many moles of c2h6o are in a 24.5 gram sample?

Chemistry
1 answer:
andreev551 [17]3 years ago
5 0
0.5326086957 moles ....
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How many sulfur atoms are there in 21.0 g of al2s3?
ValentinkaMS [17]

Given the mass of aluminum sulfideAl_{2}S_{3} = 21.0 g

Molar mass of Al_{2}S_{3} = 2 * Molar mass of Al + 3 *molar mass of S = 2(27g/mol)+3(32.g/mol)=150.g/mol

Calculating the moles of Al_{2}S_{3}:

21.0 g *\frac{1 mol}{150 g} = 0.14 mol Al_{2}S_{3}

Each mole Al_{2}S_{3} has 3 mol S.

Each mole S constitutes 6.022*10^{23} atoms of S

Calculating atoms of S in 0.14 mol Al_{2}S_{3}:

0.14 mol Al_{2}S_{3} *\frac{3mol S}{1 mol Al_{2}S_{3}  }*\frac{6.022*10^{23}atoms S }{1 mol S}

= 2.53 * 10^{23} atoms of S

3 0
3 years ago
Which type of immunity provides lifetime protection for the body against a specific pathogen?
shutvik [7]
Active immunity will be the answer
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7 0
3 years ago
In which of the following does nitrogen have the lowest oxidation state?
Leokris [45]
Nh4cl (the oxidation number of N=-3) so it would be the right answer
3 0
1 year ago
The pH of a solution can be calculated from which of the following expressions?
nordsb [41]

Answer:

(c) pH = -log [H^+]

Explanation:

pH defines the acidicity or basicity a solution.

pH also refers to hydrogen ion concentration and it is only applied to aqueous solution.

pH ranges from 0 to 14. A pH of 7 is neutral and a pH less than 7 is acidic while a pH higher than basic.

4 0
3 years ago
The integumentary system functions to retain body fluids, protect against disease, eliminate waste products, and regulate body t
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I would go with the cell membrane In this case as the cell membrane is like skin

- Hope you can brainlest this answer
7 0
3 years ago
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