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SCORPION-xisa [38]
3 years ago
10

Which definition best describes the term activation energy?

Chemistry
1 answer:
dalvyx [7]3 years ago
4 0

Answer:

B

Explanation:

bshdiidididjdjjdididid

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Iron(iii) oxide is formed when iron combines with oxygen in the air. How many moles of Fe2O3 are formed when 55.8 g or Fe reacts
iogann1982 [59]

Answer: The correct answer is Option B.

Explanation:

To calculate the number of moles, we use the formula:

Moles=\frac{\text{Given mass}}{\text{Molar mass}}

  • <u>Moles of Iron</u>

Molar mass of iron = 55.8 g/mol

Given mass of iron = 558.8

Putting values in above equation, we get:

Moles=\frac{55.8g}{55.8g/mol}=1mole

For the given chemical equation:

4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)

By Stoichiometry,

4 moles of Iron produces 2 moles of Iron(III) oxide

So, 1 mole of Ion will produce = \frac{2}{4}\times 1 = 0.5 mole of Iron (III) oxide.

Hence, the correct answer is Option B.

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3 years ago
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kykrilka [37]

Answer:b yes b yes c no c yes d yes d no

Explanation: wanna trade r o b l o x acc

7 0
3 years ago
Discuss the effect of changing the flow tube radius on flow rate.
dmitriy555 [2]

Answer:

The flow rate of a tube is the volume of fluid flowing through the tube per unit time. The flowrate is proportional to the product of the velocity of the fluid through the tube, and the cross-sectional area of the tube.

That is

Q = AV

where

A is the area of the tube

V is the velocity of the tube

The cross-sectional area of the tube is proportional to the radius of the tube. From the above equation, we can deduce that if the velocity of the fluid flowing through the tube is held constant, the flowrate of the fluid through the tube will increase with an increase in the radius of the tube, and it will decrease with a decrease in the radius of the tube.

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Look at the diagram of a fuel cell below.
Ymorist [56]
I’m pretty sure it’s abode and cathode
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3 years ago
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Volume increases, pressure stays the same, temperature
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Temperature decreases (?)
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