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lutik1710 [3]
3 years ago
6

PLS HELP ASAP WITH SCIENCE HW

Chemistry
1 answer:
polet [3.4K]3 years ago
6 0

Answer:

Concave

Explanation:

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A plant fertilizer contains 15% by mass nitrogen (N). In a container of soluble plant food, there are 12.2 oz of fertilizer. How
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One ounce is an equivalent of 28.34 grams, so times that by 12.2
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12.2 * 28.34 = 345.75.

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During a chemical reaction, calcium carbonate (CaCO3)
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A given volume of methane diffuses in 20 seconds. How long will it take the same volume of hydrogen to diffuse under the same co
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The time taken for the same volume of methane gas to diffuse is 7.1 s.

<h3>Rate of gas diffusion</h3>

The rate at which a given mass of diffuses is inversely proportional to the molar mass of the gas.

\frac{t_2}{t_1} = \sqrt{\frac{M_2}{M_1} }

where;

  • M1 is the molar mass of methane (CH4) = 16 g
  • M2 is the molar mass of hydrogen as = 2
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  • t2 is the time taken for hydrogen = ?

\frac{t_2}{t_1} = \sqrt{\frac{M_2}{M_1} }\\\\\frac{t_2}{20} = \sqrt{\frac{2}{16} }\\\\\frac{t_2}{20} = \frac{\sqrt{2} }{4} \\\\t_2 = \frac{20\sqrt{2} }{4} \\\\t_2 = 5\sqrt{2} \\\\t_2 = 7.1 \ s

Thus, the time taken for the same volume of methane gas to diffuse is 7.1 s.

Learn more about rate of gas diffusion here: brainly.com/question/26696466

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