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Arlecino [84]
2 years ago
5

Đốt cháy hết 9g kim loại magie Mg trong không khí tích tụ được 15g hợp chất magie oxit MgO. Biết rằng magie cháy là xảy ra phản

ứng với khí O2 trong không khí
a, Viết công thức về khối lượng của phán ứng xảy ra
Tính khối lượng của khí oxi phản ứng
Chemistry
1 answer:
vfiekz [6]2 years ago
5 0

Answer:

jijji[ojooooooooooooooooooooooooo

Explanation:

kjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

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3 years ago
The radius of an atom is dependent upon which 2 things? (Two answers)
matrenka [14]

Answer:

The correct options are;

C. The magnitude of attraction from its nucleus

D. The distance between the electrons and its nucleus

Explanation:

The atomic radius reduces, within a given period, as we move from left to right, the number of protons increases alongside the number of electrons and the while the quantum shell to which the extra electrons are added to is the same. Therefore, the radius of the atom is dependent on the magnitude of the attraction from the nucleus

Similarly, as we progress to the next period, with an extra quantum shell, the atomic radius is seen to increase.

Therefore, the atomic radius is determined by the distance between the electrons and its nucleus.

6 0
3 years ago
Name an allotrope of carbon which has 60 carbon atoms
Annette [7]
Buckminster fullerene C60
5 0
3 years ago
What is the speed of a basketball that is thrown 18meters in 4 seconds?
Artemon [7]

Answer:

4.5m/s

Explanation:

speed = distance/time

speed = 18/4

speed = 4.5m/s

7 0
2 years ago
The pH of lemon juice at 298 K is found to be 2.32. What is the concentration of H3O+ ions in the solution?
Vinvika [58]
PH = -log[H₃O⁺]

[H₃O⁺] = 10^-pH
<span>[H₃O⁺] = 10^-2,32
</span>[H₃O⁺] =0,0047863 ≈<u> 4,79×10×10⁻³ mol/dm³</u>


<em>B) -- 4</em><span><em>,79×10⁻³ M</em></span>
7 0
3 years ago
Read 2 more answers
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