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tensa zangetsu [6.8K]
3 years ago
15

for the reactants represented by the equation 2H2 + O2 > 2H2O, how many grams of water are produced from 376.97 mol of hydrog

en?
Chemistry
2 answers:
Hunter-Best [27]3 years ago
8 0

Answer:

6792.1 g

Explanation:

Dimensional analysis:

376.92 mol H2 * (2 mol h2o / 2 mol h2) * (18.02g h2o / 1 mol h2o)

6792.1 g

kirza4 [7]3 years ago
6 0

Answer:

Amount of water produced from 376.97 mole hydrogen is 6785.46 g

Explanation:

Given number of moles of hydrogen = 376.97 mole

The balanced reaction is shown below

2\textrm{H}_{2}\left ( g \right )+\textrm{O}_{2}\left ( g \right )\rightarrow 2\textrm{H}_{2}\textrm{O}\left ( l \right )

2 mole of water is produced from 2 mole of hydrogen gas according to the balanced reaction.

Number of moles of water produced by 376.97 mole hydrogen = 376.97 mole

Molar mass of water = 1 8 g/mol

\textrm{Amount of water produced} = \left ( 376.97 \textrm{ mole}\times 18\textrm{ g/mol} \right ) = 6785.46 \textrm{ g}

Amount of water produced = 6785.46 g

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How many moles of sulfur dioxide (SO2) are required to produce 5.0 moles of sulfur (S) according to the following balanced equat
scoundrel [369]

Answer:

1.67 moles

Explanation:

From the balanced equation of reaction:

                     SO_2 + 2H_2S -> 3S + 2H_2O

1 mole of sulfur dioxide, SO2, is required to produce 3 moles of sulfur, S.

<em>If 1 mole SO2 = 3 moles S, then, how many moles of SO2 would be required for 5 moles S?</em>

     Moles of SO2 needed = 5 x 1/3

                   = 5/3 or 1.67 moles

Hence, <u>1.67 moles of SO2 would be required to produce 5.0 moles of S.</u>

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3 years ago
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What is the pressure of 4 moles of helium in a 50 L tank at 308k using PV=nRT
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Hey there!:

p = ??

n = 4 moles

V = 50 L

T = 308 K

R =  0.082 atm

p*V = n * R * T

p * 50 = 4 * 0.082 * 308

p*50 = 101.024

p = 101.024 / 50

p = 2.020 atm


Hope that helps!


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Explanation:

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Nitrogen - 14.0067
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What volume of a 0.550 M solution of potassium hydroxide (KOH) can be made with 19.9 g of potassium hydroxide?
Natalija [7]

Answer:

0.645 L

Explanation:

To find the volume, you need to (1) convert grams to moles (using the molar mass) and then (2) calculate the volume (using the molarity ratio). The final answer should have 3 sig figs to match the sig figs of the given values.

(Step 1)

Molar Mass (KOH): 39.098 g/mol + 15.998 g/mol + 1.008 g/mol

Molar Mass (KOH): 56.104 g/mol

19.9 grams KOH              1 mole
--------------------------  x  -----------------------  =  0.355 moles KOH
                                     56.014 grams

(Step 2)

Molarity = moles / volume                            <----- Molarity ratio

0.550 M = 0.355 moles / volume                 <----- Insert values

(0.550 M) x volume = 0.355 moles              <----- Multiply both sides by volume

volume = 0.645 L                                          <----- Divide both sides by 0.550

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1 year ago
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