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alexgriva [62]
3 years ago
8

Help please !!!!!!!!!!!!

Chemistry
1 answer:
polet [3.4K]3 years ago
4 0

the answer to your question is a increase

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The chemical equation below shows the formation of aluminum oxide (Al2O3) from aluminum (Al) and oxygen (O2).
Rufina [12.5K]

Answer:

Mass = 182.4 g

Explanation:

Given data:

Number of moles of Al₂O₃ = 3.80 mol

Mass of oxygen required = ?

Solution:

Chemical equation:

4Al + 3O₂    →       2Al₂O₃

Now we will compare the moles of aluminum oxide and oxygen.

                Al₂O₃           :           O₂

                   2               :            3

                 3.80            :         3/2×3.80 = 5.7

Mass of oxygen:

Mass = number of moles × molar mass

Mass = 5.7 mol × 32 g/mol

Mass = 182.4 g

4 0
3 years ago
I'm trying to do question number 2.56
Lunna [17]
The answer is in the picture which is given below:

8 0
3 years ago
C. A 75 lb (34 kg) boy falls out of a tree from a height of 10 ft (3 m). (3 points)
KatRina [158]

(I) kinetic energy of the boy when he hits the ground =potential energy

I. e ½mv²=mgh where g is 10ms-²

m=34kg, g=10ms² , h=3m

=34×10×3

=1020j

(i i) v²=u²+2gh

v²=0²+2×10×3

= 60

v=sqrt of 60

7 0
3 years ago
A temperature of 300 Kelvin is how many degrees Celsius?<br> A. 273<br> B. 27<br> C. 573<br> D. 300
LekaFEV [45]

Answer:

The answer is B, to convert kelvin to temperature you :

Subtract 273 (k - 273)

6 0
2 years ago
If 22.5 L of nitrogen at 0.99 atm are compressed to 0.95 atm at constant
ss7ja [257]

Answer:

123456786657657656

Explanation:

4 0
3 years ago
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