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lisabon 2012 [21]
4 years ago
6

What characteristic do atoms in the same group of elements share?

Chemistry
1 answer:
matrenka [14]4 years ago
8 0

Answer:

2 option

Explanation:

please mark me brainliest and 5 star

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Which reaction best represents the complete combustion of ethane?
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Explanation:

In a combustion reaction with a hydrocarbon in the reactant side you will always have O2 as another reactant. As you will always have CO2 and H2O as the products.

Knowing that much you can set up your reaction equation..

C2H6+O2→ CO2+H2O

Now the balancing can begin. Balancing hydrocarbon combustion reactions can be tricky, but if with practice they can be really fun and very rewarding.

Start with the C atoms first and move to the H atoms next. It's easier to leave the O2 to the last, it has a way to alter the equation.

Initially, you would arrive at this, before the O2 has been balanced:

C2H6+O2→2CO2+3H2O

But, as you can see, you have an odd amount of O2 on the product side. In this case, you have to find the common factor of the amount of O on the product side and 2, Because of the O2 diatom. Therefore, 14 would be the lowest common factor of 2 and 7.

I hope it helped you!
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A photon has a wavelength of 6.2 meters. Calculate the energy of the photon in joules. (Planck's constant is 6.626 × 10-34 joule
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