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Andreas93 [3]
2 years ago
7

La masa molar del hidróxido de sodio (NaOH) es 40 g/mol. ¿Qué masa de este compuesto se necesita para producir 2,5 litros de una

disolución 2 mol/L?
Chemistry
1 answer:
Leya [2.2K]2 years ago
4 0
Go to the spanish site because I don’t think people here would be able to answer
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Hydrogen iodide, HI, is formed in an equilibrium reaction when gaseous hydrogen and iodine gas are heated together. If 20.0 g of
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Answer: D. 19.9 g hydrogen remains.

Explanation:

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

a) moles of H_2

\text{Number of moles}=\frac{20.0g}{2g/mol}=10.0moles

b) moles of I_2

\text{Number of moles}=\frac{20.0g}{254g/mol}=0.0787moles

H_2(g)+I_2(g)\rightarrow 2HI(g)

According to stoichiometry :

1 mole of I_2 require 1 mole of H_2

Thus 0.0787 moles of l_2 require=\frac{1}{1}\times 0.0787=0.0787moles of H_2

Thus l_2 is the limiting reagent as it limits the formation of product and H_2 acts as the excess reagent. (10.0-0.0787)= 9.92 moles of H_2are left unreacted.

Mass of H_2=moles\times {\text {Molar mass}}=9.92moles\times 2.01g/mol=19.9g

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2 years ago
Wood and a cement block are considered to be transparent and are good conductors of electricity.
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Answer:

ITS FALSE electricity doesn't travel through wood same with cement!

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What does the prefix “geo” mean?<br> Please Help<br> I will give you Brainlist
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Derived from a greek word meaning “Earth” in most cases it means “global” or relate to the Earth somehow
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how many moles of NaCl are dissolved in 250 mL of solution if the solution concentration is 0.150 M?​
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What lol I am just answering so I can get points :)
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"where deliberately discarded solid waste is discharged, deposited, injected, dumped, spilled, leaked, or placed so that such solid waste or a constituent thereof may enter the environment or be emitted into the air or discharged into waters, including ground waters."

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