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algol [13]
2 years ago
11

N 1868, helium was discovered by looking at the sun almost thirty years before it was discovered on earth. How was that possible

?
Group of answer choices

a,The size of the sun flares suggested that the matter was twice the mass of hydrogen

b,They captured cosmic rays from the sun that had helium in it

c,They found a meteorite that contained helium

d,By looking at the light from the sun they found a spectrun of light that was not from any known element
Chemistry
1 answer:
Free_Kalibri [48]2 years ago
5 0

Answer:

a im not sure tho

Explanation:

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According to Grahams law the rate of effusion of a gas is inversely proportional to the square root of it's molecular weight. The rate of diffusion is the measure of rate at which two gases mix. From this law we can say that for the two gases carbon monoxide and carbon dioxide, the rate of effusion of carbon monoxide is greater than that of carbon dioxide, this is because carbon monoxide is lighter (28 g) compared to carbon dioxide (44 g). 
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3 years ago
The pH at the equivalence point will be a. less than 7.00 b. equal to 7.00 Allohalineup of a sto quivalence point of a titration
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Answer: c. greater than 7.00

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3 years ago
A sample of air has a volume of 140.0 mL at 67C. To w
bonufazy [111]

Answer:

What that means is that when pressure and number of moles are kept constant, increasing the temperature will result in an increase in volume. Likewise, a decrease in temperature will result in a decrease in volume. In your case, the volume of the gas decreased by a factor of about 3, from "140.0 mL" to "50.0 mL".

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3 years ago
How does Lewis Dot Structures can be used to show reactions between different chemical elements​
notsponge [240]

Explanation:

yes yes yes yes yesterday and it kic to get me in a way that is the only one who is in my life that was my thought it

3 0
3 years ago
Give three examples, from the lab, where potential energy was converted to kinetic energy.
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Give 3 Examples of where potential energy was converted to knlinetic energy:

Curtain

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An apple from the tree then falling down

When the Curtains are still, we call the that potential energy. If you move the curtains around, that is kinetic energy

The ball is still, that is potential energy. Then the ball is moving, the is kinetic energy

There is a apple ganging from a tree, that is potential energy. That apple is fall, this is kinetic energy

Hope this helps

Don't type or write in the answer, I'm not sure what from the lab means. These are a few potential into kinetic energy I could have think of!

4 0
3 years ago
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