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mixer [17]
3 years ago
14

A solid, pure substance containing just carbon and hydrogen is found to contain 35.8g of carbon and 3.72 g of hydrogen. how many

grams of carbon will be in a 4.82 g sample of the solid?
Chemistry
1 answer:
Igoryamba3 years ago
3 0

Answer:

            4.36 g of Carbon

Solution:

Step 1: Calculate the %age of Carbon in given Solid as;

                        Mass of Carbon  =  35.8 g

                        Mass of Hydrogen  =  3.72

                        Total Mass  =  35.8 g + 3.72  =  39.52 g

                        %age of Carbon  =  (35.8 g ÷ 39.52 g) × 100

                        %age of carbon  =  90.58 %

Step 2: Calculate grams of Carbon in 4.82 g of given solid as;

                        Mass of Carbon  =  4.82 g × (90.58 ÷ 100)

                        Mass of Carbon  =  4.36 g

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Vsevolod [243]

Answer:

  • <em><u>Option B) All the ammonia is consumed</u></em>

Explanation:

<u>1. Balanced chemical equation (given):</u>

   4NH_3+5O_2\rightarrow 4NO+6H_2O

<u>2. Theoretical mole ratios:</u>

    4molNH_3:5molO_2:4molNO:6H_2O

<u>3. Limiting reactant:</u>

When  1 mole of ammonia is combined with 2 moles of oxygen, the mole ratio is:

                 1molNH_3:2molO_2

Hence, one of the reactants will be completely consumed (the limiting reactant) and, after completion, an excess of the other will remain unreacted.

You need to compare the the actual ratio with the theoretical ratio.

  • 4/5 > 1/2

Hence, NH₃ is in less proportion with respect to oxygen than what is theoretically needed, and the former is the limiting reactant.

Therefore, the 1 mole (all) of ammonia will be consumed, while some oxygen will remain as excess.  This is described by the option B) All the ammonia is consumed.

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<u>4. Analyze the other options:</u>

The amount of oxygen that will react is:

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And the amount that will remain is:

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Neither option A) nor C) describe that situation.

The amount of water produced is:

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Hence, the correct answer is the option B) All the ammonia is consumed.

6 0
3 years ago
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daser333 [38]
Hello! Your question seems incomplete, still I will try to answer it in a general way. As shown in in equation 22 KJ heat is absorbed during the reaction so it is endothermic reaction.

Effect of Temperature:
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Effect of Pressure:
It is evident from the reaction that there is an increase in volume in the formation of N2 and H2 (4 moles in whole), Hence, decrease in pressure on this system in equilibrium state will adjust itself in a direction in which the volume is increased i.e. formation of N2 and H2.

Effect of Concentration:
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