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Elena-2011 [213]
3 years ago
15

What makes elements in a group similar to one another and how would this affect their properties?

Chemistry
1 answer:
adell [148]3 years ago
6 0
Elements in the same group have similar reactivities. For example, elements in group 1 are highly reactive, since they can all take in 7 electrons. Hope I helped!
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Calculate the equilibrium constant K for the following reaction: H2(g) +
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Answer:

192.9

Explanation:

From the question,

Ke = [HCL]²/[H₂][CL₂].......................... Equation 1

Where Ke = Equilibrium constant.

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Substitute these values into equation 1

Ke = (0.0625)²/(0.0045)(0.0045)

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The useful metal manganese can be extracted from the mineral rhodochrosite by a two-step process.... In the first step, manganes
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Answer : The mass of MnCO_3 required are, 35 kg

Explanation :

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And as we are given that the yield produced from the first step is, 65 % that means,

60\% \text{ of }0.757xg=\frac{60}{100}\times 0.757x=0.4542xg

The mass of MnO_2 obtained = 0.4542x g

Now we have to calculate the mass of Mn.

The second step balanced chemical reaction is:

3MnO_2+4Al\rightarrow 3Mn+2Al_2O_3

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Molar mass of Mn = 55 g/mole

From the balanced reaction, we conclude that

As, (3\times 87)g of MnO_2 react to give (3\times 55)g of Mn

So, 0.4542xg of MnO_2 react to give \frac{(3\times 55)g}{(3\times 87)g}\times 0.4542x=0.287xg of Mn

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80\% \text{ of }0.287xg=\frac{80}{100}\times 0.287x=0.2296xg

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The given mass of Mn = 8.0 kg = 8000 g     (1 kg = 1000 g)

So, 0.2296x = 8000

x = 34843.20 g = 34.84 kg = 35 kg

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