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cluponka [151]
3 years ago
5

2h2O---->2h2+O2

Chemistry
1 answer:
shtirl [24]3 years ago
4 0
To solve this problem all you would have to do is to use the stoichiometric ratio of 1 mol of Oxygen would react with 2 mol of H2O, to find moles of water produced.

1 mol of O2 = 2 mol of H2O
20 mol of O2 = 40 mol of H2O.

The moles of water produced would be 40 moles.
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Bogdan [553]

Can't say i can answer this. :/

8 0
3 years ago
Calculate the mass of 0. 4 moles of water.​
Anna [14]

Answer:

7.208 g

Explanation:

0.4mol x \frac{2(1.01) + 16.00 g}{1 mol}

= 7.208 g

You are using molar mass of H20 to find the mass. Moles of 0.4 and 1 mol cancel out leaving you with just grams. You get the values in the numerator from the periodic table and the 2(1.01) is because you have 2 of the H in H20

5 0
3 years ago
Help I don’t understand it and I need the answers
il63 [147K]

Answer:

Demonstration 1 showed a chemical change because a new gaseous substance was formed, and demonstration 2 showed a physical change because liquid water became water vapor.

Explanation:

Chemical changes alter the chemical makeup of a subject, and a physical change only alters the appearance of a subject, not the chemical makeup.

4 0
3 years ago
True or False: Neutrons have both a positive and negative charge
uysha [10]

Answer:

false

Explanation:

7 0
3 years ago
Read 2 more answers
An atom has radius of 227 pm and crystallizes in a body-centered cubic unit cell. What is the volume of the unit cell
sdas [7]

We will see that the volume of the unit cell is 144,070,699.06 pm^3

<h3>How to get the volume of a body-centered cubic unit cell?</h3>

In a body-centered cubic unit cell, the side length of the cube is given as:

S = \frac{4}{\sqrt{3} } *R

Where R is the radius of the atom.

And the volume of a cube is the side length cubed, then we can see that the volume of our cube will be:

V = S^3 = (\frac{4}{\sqrt{3} }*227pm)^3

Solving that we get:

V  = (\frac{4}{\sqrt{3} }*227pm)^3 = 144,070,699.06pm^3

This is the approximated volume of the unit cell.

If you want to learn more about unit cell structures, you can read:

brainly.com/question/13110055

5 0
2 years ago
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