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3 years ago

7

What mass of H2SO, is required to react completely with 50.0 grams of ammonia (NH3)?

1 answer:

Reika [66]3 years ago

8 0

The answer is 10.7 grams

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In the cells of the human body, oxgen molecules are used directly in a process that what?

shepuryov [24]

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cellular respiration. C6H12O6 + 6O2 → 6CO2 + 6H2O.

Explanation:

the process where cells convert chemical energy and/or nutrients into ATP and then the cells release the waste.

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La valencia que utiliza el hidrógeno al formar un hidruro metálico es

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Answer: Esta tendencia es tan regular que el poder de combinación, o valencia, de un elemento se definió una vez como el número de átomos de hidrógeno unidos al elemento en su hidruro. El hidrógeno es el único elemento que forma compuestos en los que los electrones de valencia están en la capa n = 1.

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4 0

3 years ago

A sample contains 16. 75 g of the radioisotope U-236 and 50. 25 g of its daughter isotope, Th-232. How long did it take for deca

garri49 [273]

The time taken for the isotope to decay is 46 million years.

We'll begin by calculating the number of half-lives that has elapsed. This can be obtained as follow:

Original amount (N₀) = 50.25 g

Amount remaining (N) = 16.75

Number of half-lives (n) =?

2ⁿ = N₀ / N

2ⁿ = N₀ / N

2ⁿ = 50.25 / 16.75

2ⁿ = 3

Take the log of both side

Log 2ⁿ = 3

nLog 2 = Log 3

Divide both side by log 2

n = Log 3 / Log 2

n = 2

Finally, we shall determine the time.

Half-life (t½) = 23 million years

Number of half-lives (n) = 2

Time (t) =?

t = n × t½

t = 2 × 23

t = 46 million years

Learn more about half-life: brainly.com/question/25927447

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3 years ago

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What is the volume of 1g of ice in cm3?

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Answer:

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Explanation:

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3 years ago

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Ratling [72]

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