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Naya [18.7K]
4 years ago
11

HELP I TOTALLY FORGOT HOW TO DO THIS AND ITS DUE TOMORROW!! SOMEONE PLEASE HELP ME !

Chemistry
1 answer:
astraxan [27]4 years ago
7 0
I would suggest you to use this instead.
Just place the known substance for example O2 Oxygen as they are asking you, and see where the diagram takes you.
So the answer would be 2 because you’d look at the coefficients of the balanced equation up there. H2O
I hope that was helpful, if you have more questions please ask!

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Lisa [10]
Solar Energy

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Here are 3 energy sources that don't cause pollution, <em>I hope this helps.</em>
6 0
3 years ago
To three significant digit,what is the mass percentage of iron in the compound Fe2O3​
svlad2 [7]

69.9%

Explanation:

To find the mass percentage of iron in the compound in Fe₂O₃, we would go ahead to express the given molar mass of the iron to that of the compound.

 Mass percentage  = \frac{molar mass of Fe}{Molar mass of Fe_{2}O_{3}  }  x 100

Molar mass of Fe = 55.85g/mol

Molar mass of O = 16g/mol

Molar mass of Fe₂O₃ = 2(55.85) + 3(16) = 159.7‬g/mol

Mass percentage  = \frac{2(55.85)}{159.7}  x  100   = 69.94% = 69.9%

learn more:

Mass percentage brainly.com/question/8170905

#learnwithBrainly

4 0
3 years ago
Why does the black carbon ball have 4 holes while the white hydrogen ball only has one hole?
ryzh [129]

In atomic models balls represent an atom

Now if an atom like carbon has four holes it means it can bond with four atoms. It has valency = 4.

The atomic number of carbon is 6

the configuration is 1s2 2s2 2p2

So due to four valence electrons it can bind with four other atoms and thus we have four holes in carbon ball

The hydrogen show a valency of one

the atomic number of hydrogen = 1

its configuration is 1s1


So it can bind with one atom (max) thus we have one hole in hydrogen ball

7 0
3 years ago
How heat moves from one end of a solid to another
pantera1 [17]
In conduction, the thermal energy of a particle is transferred to other particles throughout the solid. The particles with more energy are transferred to those with less.
3 0
4 years ago
N2 + o2 -------&gt; N2 O5
Wewaii [24]
2 N2 + 5 O2 ----> 2N2O5 
Is this what you wanted?
7 0
3 years ago
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