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rjkz [21]
4 years ago
10

How many “A” columns are there on the periodic table

Chemistry
1 answer:
Cerrena [4.2K]4 years ago
8 0

Answer:

18

Explanation:

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How many grams of IRON are<br><br> contained in a 245 gram sample<br><br> of Fe2O3?
nlexa [21]

Answer:

m_{Fe}=171.7gFe

Explanation:

Hello!

In this case, since we have 245 of iron (III) oxide, we first need to compute the moles contained there:

n_{Fe_2O_3}=245gFe_2O_3*\frac{1molFe_2O_3}{159.7gFe_2O_3} =1.54molFe_2O_3

Now, as 1 mole of iron (III) oxide is related to 2 moles of iron, due to iron's subscript in the molecule, we get the moles of iron itself:

n_{Fe}=1.54molFe_2O_3*\frac{2molFe}{1molFe_2O_3} =3.08molFe

And the mass is computed based on the atomic mass of iron:

m_{Fe}=3.08molFe*\frac{55.8gFe}{1molFe} \\\\m_{Fe}=171.7gFe

Best regards!

7 0
3 years ago
Why do you think certain countries favored military solutions to the great depression while other contries did not
Vlada [557]

Answer:

The answer is below

Explanation:

Certain countries like Germany under Adolf Hitler favored military solutions to the great depression because the government felt that having a mass production of military weapons and recruitment of unemployed people or citizens into the army would change the dire situation.

On the other hand, countries like the United States did not favor the military solutions but instead choose the NEW DEAL under Franklin D Roosevelt; the reason could be linked to their democratic culture, the isolation belief tendency.

8 0
3 years ago
This formula equation is unbalanced
alexandr402 [8]

Answer:

coefficient is 2

Explanation:

3 0
3 years ago
Help!!! A, B, and C
garik1379 [7]
A. Gold,lead,glass,brick, and steel

b. 8 because they are all over 1.0 density level

c. ice and paraffin (maybe wood but that is not a liquid)<span />
5 0
3 years ago
What do u need to know to describe the velocity of an object?
Alex_Xolod [135]
To determine the velocity of an object, you need to know the displacement and the change in time. 

v = displacement / change in time

5 0
3 years ago
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