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sashaice [31]
3 years ago
14

A sugar solution consists of 0.25

Chemistry
1 answer:
leonid [27]3 years ago
4 0

Answer:

Explanation:

Your goal when trying to find a solution's molarity is to determine how many moles of solute you have in one liter of solution.

Notice that your solution has a volume of 100.0 mL. Since

∣∣ ∣∣¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯aa1 L=103mLaa∣∣−−−−−−−−−−−−−−−−

you can say that your solution has a volume that is equivalent to 110th of 1 L. Therefore, the number of moles that will be present in your sample will represent 110th of the number of moles present in 1 L of this solution.

So, use sucrose's molar mass to find the number of moles present in your sample

10.0g⋅1 mole sucrose342.34g=0.02921 moles sucrose

So, if this is how many moles you have in 100.0 mL of this solution, it follows that 1 L will contain

1L solution⋅103mL solution1L solution⋅0.02921 moles100mL solution=0.2921 moles

You get 0.2921 moles of sucrose, you solute, per liter of solution, which means that the solution's molarity will be

molarity=c=∣∣ ∣∣¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯aa0.292 mol L−1aa∣∣−−−−−−−−−−−−−−−−−

The answer is rounded to three sig figs.

Answer link

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The fuel released 90 calories of heat.

Let suppose that water experiments an entirely <em>sensible</em> heating. Hence, the heat released by the fuel is equal to the heat <em>absorbed</em> by the water because of principle of energy conservation. The heat <em>released</em> by the fuel is expressed by the following formula:

Q = m\cdot c \cdot \Delta T (1)

Where:

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If we know that m = 10\,g, c = 1\,\frac{cal}{g\cdot ^{\circ}C} and \Delta T = 9\,^{\circ}C, then the heat released by the fuel is:

Q = (10\,g)\cdot \left(1\,\frac{cal}{g\cdot ^{\circ}C} \right)\cdot (9\,^{\circ}C)

The fuel released 90 calories of heat.

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7 0
2 years ago
What is formed when water chemically combines with carbon dioxide
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When water chemically combines with carbon dioxide, a Carbonic acid is formed.

<u>Explanation</u>:

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Mr. Aguilar has ice on his wrist, literally. If the ice on Mr. Aguilar’s wrist (H2O) weighs 546 grams, how many ice particles ar
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Answer:

The answer to your question is  1.83 x 10²⁵ particles

Explanation:

Data

particles of H₂O = ?

mass of H₂O = 546 g

Process

1.- Calculate the molar mass of Water

Molar mass = (2 x 1) + (1 x 16)

                   = 2 + 16

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2.- Use proportions to find the number of particles. Use Avogadro's number.

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<span> Weak acid partially ionize in water and give only a few hydrogen ions (H</span>⁺), in the solution there molecules of acid and ions.

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