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MArishka [77]
3 years ago
9

Students conduct an experiment in which steel wool is burned in a closed test tube. The steel wool reacts with an amount of oxyg

en equal to 1.43% of the mass of the steel wool. What is the correct value for the missing mass in the table?
Chemistry
2 answers:
Ksenya-84 [330]3 years ago
6 0
The answer is 43.48g
Lubov Fominskaja [6]3 years ago
6 0

The value of the mass in the missing table is 43.48 g. Since it is in a closed system, nothing would escape. The law of conservation of mass would state that the products mass would equal the reactants mass.

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Define "Dispersed System", "Dispersion Medium", and "Dispersed Particles
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Is the density of gas unaffected by changes in temperature?
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A major component of gasoline is octane (C8H18). When liquid octane is burned in air it reacts with oxygen gas to produce carbon
Paraphin [41]

Answer:

The answer to your question is 0.4 moles of Oxygen

Explanation:

Data

Octane (C₈H₈)

Oxygen (O₂)

Carbon dioxide (CO₂)

Water (H₂O)

moles of water = ?

moles of Oxygen = 1

Balanced chemical reaction

                   C₈H₈  +10O₂  ⇒   8CO₂  +  4H₂O

              Reactant     Element     Products

                    8                 C                 8

                    8                 H                 8  

                   20                O               20  

Use proportions to solve this problem

                  10 moles of Oxygen ----------------- 4 moles of water

                    1 mol of Oxygen     ------------------ x

                    x = (4 x 1) / 10

                    x = 4 / 10

                    x = 0.4 moles of water

7 0
3 years ago
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