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2 years ago

15

Why is the spectrum from our sun a combination of spectral types?.

1 answer:

balandron [24]2 years ago

4 0

If you let the light from the Sun pass through a prism, the result is a wonderful display of all the colors of the rainbow. Separating the combined colors of the Sun like this gives you a "spectrum", which is just a measure of light emission as a function of energy (or wavelength, or frequency, which are all related).

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How many grams of oxygen are needed to

Paraphin [41]

Answer:

The value is $M_{o} = 175 g$

Explanation:

Generally the reaction between oxygen and magnesium is

$2Mg_{({s})} + O_2_{(g)} \to 2MgO_{(s)}$

Generally from the law of mass conservation in a chemical reaction we have that

$M_{m} + M_{o} = M_{z}$

Here $M_{m}$ is the mass of magnesium

$M_{o}$ is the mass of oxygen

$M_{z}$ is the mass of magnesium oxide

So

$425+ M_{o} = 600$

=> $M_{o} = 600 - 425$

=> $M_{o} = 175 g$

3 0

4 years ago

Which Group is in the leftmost column on the periodic table?

svp [43]

Alkali metals. Hope this helps

4 0

3 years ago

Read 2 more answers

Why can't all mixtures be classified as solutions?

shusha [124]

D. Not all mixtures are heterogeneous

7 0

3 years ago

The pka of hf is 3.2 determine the pkb of hf?

Julli [10]

Well, first we must remember that

$pK_{a}+pK_{b}=14$

This is because

$K_{a}*K_{b}=10^{-14}$

$-log(K_{a}*K_{b})=-log(10^{-14})\\-logK_{a}+-logK_{b}=-log(10^{-14})\\pK_{a}+pK_{b}=14$

So then

$pK_{b}=14-pK_{a}=14-3.2=1.8$

7 0

4 years ago

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The sum of the ages of a brother and sister is 26.

Goshia [24]

The brother is represented by variable b.
The sister is represented by the variable s.
This means:
b+s=26

5 0

3 years ago