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antiseptic1488 [7]
3 years ago
14

A major component of gasoline is octane (C8H8). When liquid octane is burned in air it reacts with oxygen (O2) gas to produce "0

.050 mol" carbon dioxide gas and water vapor. Calculate the moles of octane needed to produce of carbon dioxide.
Chemistry
1 answer:
qwelly [4]3 years ago
3 0

Answer:

0.0063 mol

Explanation:

Step 1: Write the balanced combustion equation

C₈H₁₈(l) + 12.5 O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(g)

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of C₈H₁₈ to CO₂ is 1:8.

Step 3: Calculate the number of moles of C₈H₁₈ needed to produce 0.050 moles of CO₂

0.050 mol CO₂ × 1 mol C₈H₁₈/8 mol CO₂ = 0.0063 mol C₈H₁₈

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Solution A contains 5 molecules of albumin (protein) and solution B contains 12 molecules of glucose. The solutions are separate
Vadim26 [7]

Answer:

C. Water will move from solution A to solution B because glucose is in higher concentration.

Explanation:

In osmosis, the molecules of solvent will pass through a semipermeable membrane from a less concentrated to a more concentrated solution.

Solution B is more concentrated, so the water will move from A to B.

A and D are wrong, because the size of the solute particles does not control the direction of osmosis.

B is wrong because water moves to the more concentrated solution.

7 0
3 years ago
(a) A mixture of milk and water can be separated by filtration.<br>and by which method ​
kap26 [50]

Answer:

Distillation

Explanation:

Distillation is the process of separating the components of a liquid by using the method of selective boiling and condensation.

Since the components of the liquid have different boiling points, they would evaporate at different temperatures, thus causing the separation to occur.

So, distillation can be used to separate a mixture of milk and water.

5 0
3 years ago
What could we do to help restore some<br> balance to the carbon cycle?
katen-ka-za [31]

Answer:

The two most obvious ways to restore balance to carbon cycles are:

1. To move away from our dependence on fossil fuels.

  2.  To farm in ways that retain more carbon for longer periods than conventional farming methods currently do.

Explanation:

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3 0
3 years ago
If anyone could explain which block in the periodic table has metals with changing oxidation numbers and why, it would be greatl
liberstina [14]

Answer:

D-block

Explanation:

Transition metals are metals of the d-block elements located between group 2 and 3 in the periodic table. They are called d-block element because the filling of electrons in their electronic configuration ends in the d-orbital.

Now, they have variable oxidation state because of their partially filled 3d orbital i.e the 3d orbital is not completely filled.

5 0
4 years ago
How much heat, in joules, is required to raise the temperature of 8.2 g of
Minchanka [31]

Answer:

113.8 J.

Explanation:

The following data were obtained from the question:

Mass (M) = 8.2 g

Change in temperature (ΔT) = 3.32 °C

Specific heat capacity (C) = 4.18 J/gºC

Heat required (Q) =..?

The heat required to raise the temperature of the water by 3.32 °C

can be obtained as follow:

Q = MCΔT

Q = 8.2 × 4.18 × 3.32

Q = 113.8 J

Therefore, the amount of heat required to raise the temperature of the water is 113.8 J.

7 0
3 years ago
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