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Arlecino [84]
3 years ago
7

If an atom, such as hydrogen, is able to form a covalent bond, describe what happens when the electron shells of two atoms overl

ap:
Chemistry
1 answer:
Ratling [72]3 years ago
7 0
If two shells overlap, they start to share electrons and thus, a bond is formed
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A sample of a compound made entirely from copper and oxygen was found to have a total mass of 0.143 g the mass of copper in the
tensa zangetsu [6.8K]

Mass of Oxygen: 0.0159 grams

Moles of Oxygen: 9.94x10^-4

To find the mass of oxygen, subtract the mass of copper from the total mass.

0.143-0.1271=0.0159

There are 0.0159 grams of Oxygen.

To find how many moles there are, divide the given amount of oxygen by the molar mass (atomic mass) of oxygen because that mass is the same as one mole of oxygen.

Molar mass of Oxygen: 16.00

0.0159/16.00=9.94*10^{-4}

There are 9.94*10^-4 moles of Oxygen.

6 0
1 year ago
Na +H₂O- NaOH +H₂ balance
Whitepunk [10]

Hey there!

Na + H₂O → NaOH + H₂

First, balance O.

One on the left, one on the right. Already balanced.

Next, balance H.

Two on the left, three on the right. Let's add a coefficient of 2 in front of NaOH and a coefficient of 2 in front of H₂O, so we have 4 on each side.

Na + 2H₂O → 2NaOH + H₂

Lastly, balance Na.

One on the left, two on the right. Add a coefficient of 2 in front of Na.

2Na + 2H₂O → 2NaOH + H₂  

This is our final balanced equation.

Hope this helps!

7 0
3 years ago
Is cutting your nails a physical or chemical change
Temka [501]
Cutting of Nails is a Physical Change since no new substance is formed.
Don't confuse it with Reversible and Irreversible Changes
4 0
3 years ago
Read 2 more answers
H2 + O2 ———> 2H2O Is this equation balanced? Why?
S_A_V [24]

Answer:

Hey There!

The answer is yes

Explanation:

There is 2 molecules of H and Two molecules of O both sides .

4 0
3 years ago
when it reacts with another element an oxegen atom gains two electrons what is the resulting particle PLEASE HELP!!
Georgia [21]

Answer:

the answer is b

Explanation:

cause it is dummy

3 0
2 years ago
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