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goblinko [34]
3 years ago
13

Magnesium burns with a very bright light. When the flame goes out, a White powder is left behind. What is the name of that white

powder?
Chemistry
2 answers:
oksano4ka [1.4K]3 years ago
8 0
The white power is formed from the combustion of magnesium with oxygen. Therefore, the white powder remaining is MgO.
gavmur [86]3 years ago
6 0
 The white powder is called Magnesium oxide. Or it's chemical symbol MgO
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<br> Determine the frequency of a green laser with a wavelength of 532nm.
const2013 [10]

Answer:

5.64*10^{14}m

Explanation:

C = Fλ

C: Speed of light = 3*10^8m/s

f: Frequency (Hz)

λ: Wavelength (m)

Rearrange formula for wavelength:

C/F = λ

\frac{3*10^8}{532*10^{-9}} =5.64*10^{14}m

6 0
3 years ago
In the following compound (HCl) How many electrons are gained and lost by each atom?
Verizon [17]

Explanation:

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ycow [4]

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3 0
2 years ago
The concentrations of the products at equilibrium are [pcl3] = 0.180 m and [cl2] = 0.250 m. what is the concentration of the rea
sineoko [7]
We have Kc = 4.2 x 10^-2 (given but missing in the question)
and When the balanced equation for this reaction is:
PCl5(g) ↔ PCl3(g) + Cl2(g)
so, according to the Kc formula:
Kc = the concentration of products / the concentration of the reactants
so, to get the concentration of the reactants in equilibrium, the concentration of the products / the concentration of the reactants should equal the Kc value which is given in the question (missing in your question).
So by substitution in Kc formula: 
Kc   = [PCl3]*[Cl2] / [PCl5]
4.2 x 10^-2 =  0.18 * 0.25 /[PCl5]
∴[PCl5] = 0.18*0.25 / 4.2x10^-2 = 1.07
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4 0
3 years ago
Why is sugar considered an organic compound
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