How heavy is one atom of hydrogen

Chemistry

1 answer:

Harman [31]2 years ago

7 0

Hello!

the atomic mass of one atom of hydrogen is equal to 1.00784 in atomic mass units

one atomic mass unit is equal to 3.6609e-27 pounds

which means one atom of hydrogen is equal to 3.9478732e-27 pounds

I hope this helps, and have a nice day!

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A model used for the yield Y of an agricultural crop as a function of the nitrogen level N in the soil (measured in appropriate

lisov135 [29]

Answer:

It is 3.

Explanation:

The model written correctly is:

$Y=\frac{kN}{9+N^2}$

This is a mathematical question, instead of a chemistry question, and you should use calculus to find the nitrogen level that gives the best yield, since this is an optimization problem.

The best yield is the maximum yield, and the maximum, provided that it exists, is found using the first derivative and making it equal to zero: Y' = 0

To find Y' you must use the quotient rule.

$Y'=\frac{(kN)'(9+N^2)- (kN)(9+N^2)'}{(9+N^2)^2}\\ \\Y'=\frac{k(9+N^2)-kN(2N)}{(9+N^2)^2}\\ \\Y'=\frac{9k + kN^2 - 2kN^2}{(9 + N^2)^2}=\frac{9k-kN^2}{(9+N^2)^2}$

Now make Y' = 0

The denominator is never equal to zero, because it is always positive and greater than 9.

Make the numerator equal to zero:

9k - kN² = 0

Factor: k (9 - N²) = 0

Since k is a positve constant, it is not equal to zero, and the other factor, 9 - N², must be equal to zero:

9 - N² = 0 ⇒ (3 - N) (3 + N) = 0

⇒ 3 - N = 0 or 3 + N = 0 ⇒ N = 3 or N = -3.

Since N is nitrogen level, it cannot be negative and the only valid answer is N = 3.

You can prove that it is a maximum (instead of a minimum) finding the second derivative or testing some points around 3 (e.g. 2.5 and 3.5).

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2 years ago

Balance the following chemical equation:<br> C2H60+02 → CO2 + H20

pantera1 [17]

Answer:

Explain: In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.

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2 years ago

The Bantu were experts in this form of metallurgy. gold steel iron copper

son4ous [18]

they're experts in iron metallurgy

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Mostly they use it for their Agricultural system ( such as their Irrigation system, for their agricultural tools, etc)
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2 years ago

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If you have a solution that contains 46.85 g of codeine, C18H21NO3, in 125.5 g of ethanol, C2H5OH, what is the mole fraction of

irakobra [83]

Answer:

0.22

Explanation:

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