Answer:
wave length=speed/frequency
=345/229
If there is no atmosphere on the planet or the heavenly body on which we are the observers, then there would be no scattering of the sun's light and hence, the sky would aappear black. For example, if we are on the moon, the sky appears black ,unlike on earth(where it appears blue) because there is no atmosphere on moon.
Q= ? kJ
m= 1.37 kg ×
=1370 g<u>
</u>
c=4.18 J/g° C
ΔΤ= <span>89.5-21.3=
68.2˚C
</span>?
J = (1370
g) (4.18
J/g˚C) <span>(68.2˚C)
</span>q
= 390,554 J×
<u />
q
= 391 kJ
Answer:
--Acid is the substance when dissolved in water, increases the concentration of H+ ions.
--Such compound whose chemical formula begins with H, for example HCl (Hydrochloric acid), H3BO3 (Boric acid), CH2O3 (Carbonic
acid). Although CH3COOH (Acetic acid) is an exception.
--Its less than 7.
--Bases are the proton acceptor.
--Such compounds whose chemical formula ends with OH, for example KOH (Potassium hydroxide), NaOH (Sodium hydroxide).
--Its greater than 7.
Explanation:
Answer:
Explanation:
Hello!
In this case, since the formation reaction of a compound is undergone when the pure elements composing it are combined, for gaseous hydrogen peroxide, gaseous diatomic hydrogen and oxygen (standard state) must be combined in order to obtain the gaseous hydrogen peroxide as shown below:
Whereas it is proved there are two hydrogen and oxygen atoms at each side of the chemical equation and therefore it is balanced.
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