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NNADVOKAT [17]
3 years ago
10

How many centimeters are in 5.6 x 10-2 meters?

Chemistry
1 answer:
drek231 [11]3 years ago
8 0

Answer:

0.5

Explanation:

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The limiting reactant is the chemical substance that determines the amount of product(s) that can ultimately be formed in a reac
Tamiku [17]

Answer:

The reactant in excess is Al (s)

The mass of remaining excess reactant is 8.76 g.

Explanation:

This is the reaction:

4 Al(s) + 3 O₂(g) → 2 Al₂O₃(s)

4 moles of solid aluminun reacts with 3 moles of oxygen, to make 2 moles of alumina.

Molar mass Al: 26.98 g/m

Molar mass O₂ : 32.00 g/m

Mass / Molar mass : Moles

20 g Al / 26.98 g/m = 0.741 moles

10 g O₂ / 32.00 g/m =  0.312 moles

Let's find out the limiting reactant and the reactant in excess by rules of three:

4 moles of Al reacts with 3 moles of O₂

0.741 moles of Al reacts with  (0.741 .3)/4 = 0.555 moles

Now we know that are needed 0.555 moles of O₂ to consume all the Al but we only have 0.312 moles of O₂.

The O₂ is the limiting reactant, so the Al is the reactant in excess.

Let's make another rule of three

3 moles of O₂ reacts with 4 moles of Al

0.312 of O₂ reacts with  (0.312  .4)/3 = 0.416

We need 0.416 moles to consume all the O₂ and we have 0.741 moles of Al. There's still Al to consume, that's why the Al is the reactant in excess.

When we use 0.416 moles of 0.741 moles of Al, 0.325 moles are remaining to consume all the Al.

Let's calculate the mass

0.325 moles . 26.98 g/m = 8.76 grams

5 0
3 years ago
Which element was first discovered on the sun? hydrogen carbon oxygen helium
EastWind [94]
The element first discovered in the sun is the element Helium. This noble gas is the second most abundant element<span> in the universe and was </span>discovered<span> on the </span>sun<span> before it was discovered on the earth. Helium is the result of the nuclear fusion of hydrogen creating thus the mass of energy in the sun.</span>
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Uranium atoms each have 92 protons. How many protons does each U-238 atom have?
Nesterboy [21]

A.92 all Uranium atoms contain the same amount of protons

5 0
2 years ago
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Check my answers please? Only 5...Will reward medal to best answer and perhaps become a fan! :)
stellarik [79]
The correct answer is <span>Fusion Curve</span>
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