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OlgaM077 [116]
3 years ago
6

4 A Small rock

Chemistry
1 answer:
vodomira [7]3 years ago
6 0

3 millimeters is the rock

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1. Balance the equation, then answer the following based on the equation
Artemon [7]

Answer:

Q1. a) 4Al + 3O₂ ➟ 2Al₂O₃

b) 7.4 moles

c) 11.1 moles

Explanation:

To balance an equation, ensure that the total number of atoms of each element on both sides are equal.

Al + O₂ ➟ Al₂O₃

On the left side of the arrow, you would find the reactants while the product(s) is found on the left hand side.

<u>Reactants</u>

Al atoms: 1

O atoms: 2

<u>Product</u>

Al atoms: 2

O atoms: 3

After balancing,

4Al + 3O₂ ➟ 2Al₂O₃

We have 4 Al atoms and 6 O atoms on both sides.

b) The balanced equation tells us the mole ratio of Al to Al₂O₃.

Al: Al₂O₃

= 4: 2 (÷2 throughout)

= 2: 1

This means that for every 1 mole of Al₂O₃, 2 moles of Al is needed.

Since we need 3.7 moles of Al₂O₃,

number of moles of Al needed

= 2×3.7

= 7.4

c) 4Al + 3O₂ ➟ 2Al₂O₃

For every 4 moles of Al, 3 moles of O are needed.

For each mole of Al,

number of moles of O needed

= 3÷4

= 0.75

For 14.8 moles of Al,

number of moles of O required

= 0.75 ×14.8

= 11.1

4 0
2 years ago
What are bonds in metals like?<br><br> Please Answer - In full sentences (3)
NARA [144]
Metallic bonds are bonds between 2 metals. Their electrons flow around freely unlike covalent or ionic bonds.
7 0
3 years ago
Read 2 more answers
What is the frequency in hertz of the blue light having a wavelength of 4.25×10^-11
Anna71 [15]
It would be:  c/∧ = 3*10^8 / 4.25*10^-11 = 7.05 * 10^18 /s...
4 0
3 years ago
How are the valence electrons organized to form a bond between the atoms
Elina [12.6K]

Answer: add up to eight

Explanation: NaO as one bond as it takes only one and seven to make eight. Leaving NaO with three lone pairs

6 0
3 years ago
Which diagram represents an electrically neutral atom​?
Rom4ik [11]

Answer:

D

Explanation:

I hope this right, I'm sorry if it's not.

For an atom to be neutral, it has to have the same amount of protons and electrons. Because protons and electrons have opposite charges, when there is an equal amount of them they balance each other out

5 0
3 years ago
Read 2 more answers
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