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Semenov [28]
2 years ago
14

What mass of Al2O3 is formed in the reaction of 4700 kg of aluminum? Answer in units of kg

Chemistry
1 answer:
d1i1m1o1n [39]2 years ago
6 0

Answer:

2350kg of Al₂O₃

Explanation:

<u><em>Step 1 : Write the balanced chemical equation:</em></u>

4Al + 3O₂ → 2Al₂O₃

<u><em>Step 2: Find the Ratio of Al :</em></u> Al₂O₃

Al : Al₂O₃

4 :  2

2 : 1

4700: 2350

= 2350kg of Al₂O₃

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a serving of a particular fruit dessert contains 20.0 g of sugar. if all the sugar is sucrose, c12h22o11, how many molecules of
Harrizon [31]

Taking into account the definition of Avogadro's number and molar mass, 3.49334×10²² molecules of sucrose are present.

<h3>Definition of molar mass</h3>

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

<h3>Avogadro's Number</h3>

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

<h3>Molecules of sugar in this case</h3>

In first place, the molar mass of sucrose is 342 g/mole. So, you can apply the following rule of three: If by definition of molar mass 342 grams of the compound are contained in 1 mole, 20 grams of the compound are contained in how many moles?

amount of moles=\frac{20 gramsx1 mole}{342 grams}

<u><em>amount of moles= 0.058 moles</em></u>

Now, considering the Avogadro's number, you can apply the following rule of three: If 1 mole of the compound contains 6.023×10²³ molecules, 0.058 moles contains how many molecules?

amount of moleculas= (6.023×10²³ molecules × 0.058 moles)÷ 1 mole

<u><em>amount of molecules= 3.49334×10²² molecules</em></u>

Finally, 3.49334×10²² molecules of sucrose are present.

Learn more about

molar mass:

brainly.com/question/5216907

brainly.com/question/11209783

brainly.com/question/7132033

brainly.com/question/17249726

Avogadro's Number:

brainly.com/question/11907018

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#SPJ12

6 0
2 years ago
A pound is approximately 0.45 kilogram. A person weighs 87 kilograms. What is the person’s weight, in pounds, when expressed to
Sauron [17]

Answer:

87 kilograms =191.8 pounds

4 0
3 years ago
Read 2 more answers
4Fe +302–&gt; 2Fe2O3 how many moles of Fe2O3 are produced when 0.27 moles of Fe is reacted?
Svet_ta [14]

Answer:

0.14 moles of Fe₂O₃

Explanation:

Given parameters:

Number of moles of Fe  = 0.27moles

Unknown:

Number of moles of Fe₂O₃ = ?

Solution:

To solve this problem, we are going to the work from the known specie to the unknown using their number of moles.

We first obtain the balanced equation of the reaction;

                 4Fe   +    3O₂     →    2Fe₂O₃

The equation above is balanced;

                    4 moles of Fe produced 2 moles of Fe₂O₃

                  0.27 moles of Fe will produce   \frac{0.27 x 2}{4}    = 0.14 moles of Fe₂O₃

4 0
3 years ago
20 ml of an approximately 10% aqueous solution ofethylamine, ch3ch2nh2, is titrated with 0.3000 maqueous hcl.which indicator wou
S_A_V [24]

phenolphthalein would be most suitable
5 0
3 years ago
It is found when an unknown solid solute is dissolved in water that the solubility of the solid increases if temperature is decr
mina [271]

Answer:

exothermic entropy is increased

Explanation:

An exothermic process is one whose rate increases when the temperature is decreased. Hence if a decrease in temperature favours the dissolution of more solute at equilibrium, then the process is exothermic.

Similarly, the dissolution of a solute in a solvent increases the disorderliness (entropy) of the system because of the increase in the number of particles present. Hence once a solute in dissolved, the entropy of the system increases.

5 0
3 years ago
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