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vladimir2022 [97]
2 years ago
12

Your friend had an upset stomach caused by indigestion. His mother explained to him

Chemistry
1 answer:
ddd [48]2 years ago
4 0

Answer:

because it may cause burn that causes acid to build up which causes you to keep having an upset stomach

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Based on what basis the elements had been arranged
salantis [7]

Answer:

B

The increase in the atomic number

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3 years ago
DO TODAY, PLS HURRY I DONT HAVE TIME :C (10 points, this is science, and its a writeing Question) some animals survive winter by
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Explanation: they do not hibernate

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Debora [2.8K]

Explanation:

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A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration o
taurus [48]

Answer:

The concentration the student should write down in her lab is 2.2 mol/L

Explanation:

Atomic mass of the elements are:

Na: 22.989 u

S: 32.065 u

O: 15.999 u

Molar mass of sodium thiosulfate, Na2S2O3 = (2*22.989 + 2*32.065 + 3*15.999) g/mol = 158.105 g/mol.

Mass of Na2S2O3 taken = (19.440 - 2.2) g = 17.240 g.

For mole(s) of Na2S2O3 = (mass taken)/(molar mass)

= (17.240 g)/(158.105 g/mol) = 0.1090 mole.

Volume of the solution = 50.29 mL = (50.29 mL)*(1 L)/(1000 mL)

= 0.05029 L.

To find the molar concentration of the sodium thiosulfate solution prepared we use the formula:

= (moles of sodium thiosulfate)/(volume of solution in L)

= (0.1090 mole)/(0.05029 L)

= 2.1674 mol/L

6 0
3 years ago
Which of the following decomposition reactions is/are correct?
Valentin [98]
<span>The generalized reaction for chemical decomposition is: AB → A + B

NaOH is sodium hydroxide. When sodium and water is combined it makes sodium hydroxide and hydrogen

When sodium hydroxide decomposes under thermal decomposition, it breaks down into sodium oxide and water.

Thus, </span><span>C) 2NaOH Na2O + H2O</span>
4 0
3 years ago
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