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vazorg [7]
2 years ago
5

How many protons and electrons does oxygen have? What about hydrogen? Draw a model of each atom if that helps you think about th

e differences between them ?
Chemistry
1 answer:
Tems11 [23]2 years ago
5 0

Answer:

Two electrons fit in the first shell out from the nucleus and eight fit in the second. Every element with more protons than the two of Helium needs to work on shells outside the first one. one you get to ten, you have filled the first two shells.

In a water molecule, oxygen forms one covalent bond with EACH of TWO hydrogen atoms. As a result, the oxygen atom has a stable arrangement of 8 valence electrons. Each hydrogen atom forms only one bond because it needs only two electrons to be stable.

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Jill and George both push on the same cart with 20 units of force,but in opposite directions.What will happen to the cart
Anna [14]

Explanation:

It is given that, Jill and George both push on the same cart with 20 units of force, but in opposite directions.

We know that when two forces are acting in opposite direction, they cancel out each other.

Net force in this case = +20 N - 20 N = 0

It means the net force is 0. As a result, the cart will not move. The forces acting on the cart are balanced.

6 0
3 years ago
Which example is a weak base? <br> ethyl alcohol, ammonia, potassium hydroxide or vinegar?
BlackZzzverrR [31]

Answer:

potassium

Explanation:

b/c electronegativitu

7 0
2 years ago
In the chemical formula, is the metal or nonmetal symbol written first?
Nikitich [7]
<span>Chemical formulas are written from the most metllic 
for example group Alkali Metals are the most metallic, so they will be written first.</span>
6 0
3 years ago
What is the percent yield if 248.7 g of Cu is produced when 87 g of Al reacts with an excess
valkas [14]

Answer:

2.09 g Cu

Explanation:

First, we have to balance the equation:

3Al(s) + 3CuSO4(aq) = Al2(SO4)3(aq) + 3Cu(s)

Then we have to change grams of Al to mol:

1 mol Al = 26.98 g

1.37 g Al x (1 mol/26.98 g) = 0.051 mol

Then, we use the balanced equation to find the mol of Cu produced:

According to the equation:

3 mol Al produces 3 mol of Cu

3 mol Al = 3 mol Cu

So:

0.051 mol Al x (3 mol Cu/3 mol Al) = 0.051 mol Cu

This mol value is the theoric yield of the reaction.

Remember the equation for yield percent:

%Y = (Y real / Y theoric) x 100

Y theoric = 0.051 mol Cu

% Y = 67.4%

Let's replace these values on the equation and then fin Y real.

67.4 % = (Y real / 0.051) x 100

Y real = 0.033 mol Cu

So the real produced mol is 0.033 mol Cu.

Let's change these moles to grams:

1 mol Cu = 63.55 g

0.033 mol Cu x ( 63.55 g Cu/ 1 mol Cu) = 2.09 g Cu

If you want, watch the image attached is more clear the

mathematical procedure

Explanation:

6 0
2 years ago
What type of bond is most likely being represented in row 1?
Angelina_Jolie [31]

ionic is the awnser have a blessed day

5 0
3 years ago
Read 2 more answers
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