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9966 [12]
3 years ago
14

Which statement is correct about the water cycle?

Chemistry
1 answer:
OleMash [197]3 years ago
7 0

Answer:

precipitation is when water flows into the ground

Explanation:

.................

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Can a physical change, change what a substance is?
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Physical changes are changes affecting the form of a chemical substance, but not it's chemical composition. 
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What is 31 grams converted to milligrams
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31,000 milligrams is equal to 31 grams
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On a topographic map every fifth contour is darkened. What is this line call?
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I think it is D but im not sure 
8 0
4 years ago
9. Calculate the percentage composition of silver sulfate, Ag2SO4.
riadik2000 [5.3K]

Answer:

69% Ag, 10.5% S, 20.5% O.

Explanation:

Ag₂SO₄ → Molar mass = 311.8 g/mol

2 mol of Ag → 107.87g/m . 2m = 215.74 g

1 mol of S → 32.06g/m . 1m = 32.06 g

4 mol of O → 16g/m  .4m = 64 g

Percentage composition will be:

(Mass of Ag/ Total mass) . 100

(215.74 g / 311.8 g) . 100 = 69 %

(Mass of S/ Total mass) . 100

(32.06 g / 311.8 g) .100 = 10.5%

(Mass of O/ Total mass) . 100

(64 g / 311.8 g) . 100 = 20.5 %

7 0
3 years ago
The ideal constant has a value of 0.0821 as long as the units for the other variables are...
Alex

Answer:

Option D. atm, L, K, mole

Explanation:

To know which option is correct, do the following:

We shall use the standard value for each variable to obtain the gas constant. This can be obtained as follow:

Volume (V) = 22400 mL

Pressure (P) = 760 mmHg

Number of mole (n) = 1 mole

Temperature (T) = 273 K

Gas constant (R) =?

PV = nRT

R = PV / nT

R = (760 × 22400) / (1 × 273)

R = 62358.97 mmHg.mL/Kmol

Volume (V) = 22.4 L

Pressure (P) = 760 mmHg

Number of mole (n) = 1 mole

Temperature (T) = 273 K

Gas constant (R) =?

PV = nRT

R = PV / nT

R = (760 × 22.4) / (1 × 273)

R = 62.359 mmHg.L/Kmol

Volume (V) = 22400 mL

Pressure (P) = 1 atm

Number of mole (n) = 1 mole

Temperature (T) = 273 K

Gas constant (R) =?

PV = nRT

R = PV / nT

R = (1 × 22400) / (1 × 273)

R = 82.05 atm.mL/Kmol

Volume (V) = 22.4 L

Pressure (P) = 1 atm

Number of mole (n) = 1 mole

Temperature (T) = 273 K

Gas constant (R) =?

PV = nRT

R = PV / nT

R = (1 × 22.4) / (1 × 273)

R = 0.0821 atm.L/Kmol

From the above illustrations, we can see that the gas constant will have a value for 0.0821 as long as other variables are: atm, L, K, mole

4 0
3 years ago
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