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8090 [49]
3 years ago
13

Estado de oxidación de doro​

Chemistry
1 answer:
ad-work [718]3 years ago
3 0

Answer:

Entonces, ¿cuál es tu pregunta? No veo una foto

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cestrela7 [59]

Answer:

smoky air

fresh river water

Explanation:

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5 0
3 years ago
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The density of a solution of sulfuric acid is 1.29 g/cm3 and it is 38.1% acid by mass. What volume of the sulfuric acid solution
pychu [463]

Answer : The correct option is, (7) 332 mL

Explanation : Given,

Density of solution of sulfuric acid = 1.29g/cm^3=1.29g/mL

38.1 % acid by mass that means 38.1 grams of sulfuric acid present in 100 grams of solution of sulfuric acid.

Now we have to calculate the mass of solution of sulfuric acid.

As, 38.1 grams of sulfuric acid present in 100 grams of solution of sulfuric acid

So, 163 grams of sulfuric acid present in \frac{163}{38.1}\times 100=428.95 grams of solution of sulfuric acid

Now we have to calculate the volume of sulfuric acid solution.

Density=\frac{Mass}{Volume}

1.29g/mL=\frac{428.95g}{Volume}

Volume=332mL

Therefore, the volume of sulfuric acid solution needed is 332 mL.

6 0
4 years ago
The strongest substance in your body is:
Sholpan [36]
The enamel is the strongest substance in our bodies mainly inside your mouth.
3 0
4 years ago
A certain reaction is thermodynamically favored at temperatures below 400. K, but it is not favored at temperatures above 400. K
Ilya [14]

Answer:

-0.050 kJ/mol.K

Explanation:

  • A certain reaction is thermodynamically favored at temperatures below 400. K, that is, ΔG° < 0 below 400. K
  • The reaction is not favored at temperatures above 400. K, that is. ΔG° > 0 above 400. K

All in all, ΔG° = 0 at 400. K.

We can find ΔS° using the following expression.

ΔG° = ΔH° - T.ΔS°

0 = -20 kJ/mol - 400. K .ΔS°

ΔS° = -0.050 kJ/mol.K

8 0
3 years ago
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A block of aluminum occupies a volume of 15.0 cm and weighs 40.5 g. What is its density?
mafiozo [28]

Answer:

2.7 g/cm^3

Explanation:

D = m/V

D = 40.5 g / 15 cm^3

D =  2.7 g/cm^3

7 0
3 years ago
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