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Volgvan
3 years ago
15

Why is grass green? Also why is the sky blue???

Chemistry
2 answers:
lara31 [8.8K]3 years ago
5 0
<span>Like many plants, most species of grass produce a bright pigment called chlorophyll. Chlorophyll absorbs blue light (high energy, short wavelengths) and red light (low energy, longer wavelengths) well, but mostly reflects green light, which accounts for your lawn's color.

</span>sky<span> is </span>blue<span> because molecules in the air scatter </span>blue<span> light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colors because the </span>blue<span> light has been scattered out and away from the line of sight.
</span>
Hope this Helped!
erastova [34]3 years ago
4 0
The plant has a specific cell that makes it appear green it is call chlorophyll. And the sky is blue because molecules in the air scatter blue light from the sun more then they scatter red light. <span>When we look towards the sun at sunset, we see red and orange colors because the </span>blue<span> light has been scattered out and away from the line of sight.</span><span />
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PLS HURRY: 217 mL of Helium gas at 551oC is brought to standard temperature (0oC) while the pressure is held constant. What is t
krok68 [10]
71.9 mL is the answer
6 0
3 years ago
Molecular formula of sodium sulphate from Criss cross method​
uranmaximum [27]

Answer:

Na2SO4

Explanation:

In the crisscross method, we can write the correct formula for an ionic compound by crossing over the numerical value of each of the ion charges to now serve as the subscript of the oppositely charged ion. Subsequently, the signs of the charges are dropped and the correct formula of the ionic substance is obtained.

For sodium sulphate;

Na ^+        SO4^2-

By crisscrossing and dropping the signs to obtain the subscripts we now have;

Na2SO4

5 0
3 years ago
How many moles are in 2.10 grams of KCr(SO4)2 • 12H2O
mart [117]

Answer:

42996.19989

Explanation:

Molar mass of KCr(SO4)2 12h2o is 20474.3809 g/mol x 2.1 = 42996.19989

8 0
4 years ago
Are the following quantum number combinations allowed? If not, show two ways to correct them:
evablogger [386]

Answer:

(a) n = 2; l = 0; ml = -1 ⇒ WRONG

change ml = 0, or l = 1 to correct.

(b) n = 4, l = 3; ml = -1 ⇒ CORRECT

(c) n = 3, l = 1; ml = 0 ⇒ CORRECT

(d) n = 5, l = 2; ml = +3 ⇒ WRONG

change ml = 0, ±1 or ±2, or l = 3 or l = 4 to correct.

Explanation:

The rules for electron quantum numbers are:

1. Shell number, 1 ≤ n

2. Subshell number, 0 ≤ l ≤ n − 1

3. Orbital energy shift, -l ≤ ml ≤ l

4. Spin, either -1/2 or +1/2

Now, apply in our case

(a) n = 2; l = 0; ml = -1 ⇒ WRONG

-l ≤ ml ≤ l, so either change ml = 0 or l = 1 to correct.

(b) n = 4, l = 3; ml = -1 ⇒ CORRECT

(c) n = 3, l = 1; ml = 0 ⇒ CORRECT

(d) n = 5, l = 2; ml = +3 ⇒ WRONG

-l ≤ ml ≤ l, so either change ml = 0, ±1 or ±2, or l = 3 or l = 4 to correct.

7 0
4 years ago
Can swords shatter from cold temperatures
sp2606 [1]
Depends on how the sword is made, what materials are used and temperature used but yes they can shatter.

When molecules cool down they stop vibrating and moving as much and so they "shrink" and the metal of the sword becomes brittle. sometimes they shrink at different phases which cause tension in the sword if this tension is strong enough it can cause the metallic bonds to break causing the sword to shatter.

hope that helps 
6 0
3 years ago
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