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Chemistry

1 answer:

3241004551 [841]3 years ago

5 0

Answer:

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Two hydrogen atoms collide in a head on collision and end up with zero kinetic energy. Each then emits a photon of 121.6 nm (n=2

Zinaida [17]

Explanation:

Expression for the kinetic energy is as follows.

K.E = $\frac{1}{2}mv^{2}$

Now, total kinetic energy will be as follows.

K.E = $2 \times \frac{1}{2}mv^{2}$ = $m \times v^{2}$

Since, this energy converts into electromagnetic radiation of wavelength 121.6 nm.

Relation between energy and photon is as follows.

Energy of photon = $\frac{hc}{\lambda}$

= $\frac{6.626 \times 10^{-34} \times 3 \times 10^{8}}{121.6 \times 10^{-9}}$

= $1.63 \times 10^{-18} J$

$m \times v^{2} = 1.63 \times 10^{-18}$

v = $\sqrt{\frac{1.63 \times 10^{-18}}{1.67 \times 10^{-27}}$

= $3.12 \times 10^{4}$ m/s

Thus, we can conclude that atoms were moving at a speed of $3.12 \times 10^{4}$ m/s before the collision.

8 0

4 years ago

How many grams of benzene (C6H6) will produce 42 grams of CO2?

3241004551 [841]

The balanced chemical reaction is:

2C6H6 + 15O2 → 12CO2 + 6H2O

We are given the amount of carbon dioxide to be produced for the reaction. This will be the starting point of our calculations.

42 g CO2 ( 1 mol CO2 / 44.01 g CO2) ( 2 mol C6H6 / 12 mol CO2 ) (78.1074 g C6H6 / 1 mol C6H6) = 12.42 grams of C6H6

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3 years ago

What is in a microscope the enlarges things so our eye can see them?

Fittoniya [83]

Answer:lenses

Explanation:

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3 years ago

Generally, systems move spontaneously in the direction of increasing entropy. TRUE FALSE

allochka39001 [22]

Answer:

true