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3 years ago

Plz help quick

Chemistry

2 answers:

vovangra [49]3 years ago

4 0

Answer:

Explanation:

If oxygen reacts with iron, then both must be reactants and rust the product of that reaction

mariarad [96]3 years ago

4 0

Answer:

4Fe → 3O2 + 2Fe2O3

Explanation:

We see that the equation balances

There are 4 atoms of Iron (Fe) on the left and 2*2 = 4 on the right.

3 * 2 = 6 of oxygen on the left and 2 * 3 = 6 on the right.

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Above the critical pressure, a substance is a(n) _____ fluid.

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A substance above its critical pressure is <span>supercritical.

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3 years ago

g Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water and carbon d

LenaWriter [7]

Answer:

6.49g

Explanation:

Let's consider the balanced reaction for photosynthesis.

6 CO₂ + 6 H₂O = C₆H₁₂O₆ + 6 O₂

We can establish the following relations:

1 mole of CO₂ has a mass of 44.01 g (MW 44.01)
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1 mole of C₆H₁₂O₆ has a mass of 180.16 g/mol.

The mass of glucose produced by the reaction of 9.51 g of carbon dioxide is:

$9.51gCO_2 \times \frac{1molCO_2}{44.01gCO_2} \times \frac{1molGlucose}{6molCO_2} \times \frac{180.16gGlucose}{1molGlucose} = 6.49g Glucose$

6 0

3 years ago

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An ionic bond is an _________ attraction between ions.

BabaBlast [244]

Answer:

An ionic bond is an attraction between ions of opposite charge in an ionic compound.

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3 years ago

Assuming the materials don't mix, show how the materials would "stack up" in a graduated cylinder. (Based on their densities) (J

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2 years ago

A solution is made by dissolving 9.74 g of sodium sulfate in water to a final volume of 165 mL of solution. What is the weight/w

MatroZZZ [7]

Answer: The weight/weight % or percent by mass of the solute is 5.41 %.

Explanation:

Mass of the sodium sulfate,w = 9.74 g

Volume of the water = 165 mL

Density of the water = 1 g/mL

$Density=1 g/mL=\frac{\text{Mass of water}}{\text{Volume of water}}$

Mass of the water = $1 g/mL\times 165 mL=165 g$

Mass of the solution, W:

Mass of solute + Mass of solvent =9.47 g + 165 g=174.47 g

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The weight/weight % or percent by mass of the solute is 5.41 %.

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3 years ago