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3 years ago

HELP ASAP!!

2 answers:

4 0

109/8.56=12.7
50+12.7
V=62.7

Mass= Volume x Density so i divided the mass and density to get the volume. and afterwards i would just add it to the mass to get my final answer

r-ruslan [8.4K]3 years ago

3 0

Answer:

The final volume reading in the graduated cylinder 62.7 ml.

Explanation:

Initial level of the water in graduated cylinder = 50 .0 ml

To calculate volume of a substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

We are given:

Density of liquid = 8.56 g/mL

Mass of substance = 109 g

Putting values in above equation, we get:

$8.56 g/mL=\frac{109 g}{\text{Volume of substance}}\\\\\text{Volume of substance}=12.7 mL$

Volume occupied by the substance = 12.7 mL

Volume occupied by the substance will increase the volume of the water more by 12.7 ml.

The final volume reading in the graduated cylinder :

50 ml + 12.7 mL = 62.7 mL

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3 years ago

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Answer:

223.4 grams of iron can be produced from 2.5 moles of Fe2O3 and 6.0 moles of CO.

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The balanced reaction is:

Fe₂O₃ (s) + 3 CO(g) → 2 Fe(s) + 3 CO₂ (g)

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactant and product participate in the reaction:

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the molar mass of the compounds participating in the reaction is:

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CO₂: 12 g/mole + 2*16 g/mole= 44 g/mole

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The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

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3 years ago

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3 years ago