<h2>Answer:</h2>
There is only one valence electron in Al(OH)4- anion.
<h3>Explanation:</h3>
- Valency is the number of electrons in the outer most shell of an atom.
- In this compound, aluminium has the valency of +3. It means Al needs only 3 electrons to complete its outer most shell.
- Hence the stable molecule Al(OH)3.
- But the addition of one another OH- leads to the negative charge and there is one spare electron which can make bond to an atom to stable the compound.
Molar mass of cuso4=63.5+32+4*16= 159.5 g
6.02*10^23 molecules weigh=159.5 g
1 molecule weigh=159.5/6.02*10^23 g
3.36 × 10^23 molecules weigh=159.5/6.02*10^23*3.36× 10^23
=89.023g
Nuclear reactions happen inside the nucleus,so it changes the protons and neutrons
Refer to the diagram shown below.
In geosynchronous orbit, the satellite makes one circular revolution at the equator in 1 day.
From tables, obtain
r = 42,164 km = 4.2164 x 10⁷ m, the earth's radius
g = 9.8 m/s², acceleration due to gravity.
Note that 1 day = 86400 s
The angular velocity of rotation is
ω = (2π)/86400 = 7.2722 x 10⁻⁵ rad/s
The centripetal acceleration on the satellite is
a = rω²
= (4.2164 x 10⁷ m) * (7.2722 X 10⁻⁵ rad/s)²
= 0.223 m/s²
The weight of the 2000 kg satellite is
W = m(g - a)
= (2000 kg) * (9.8-0.223 m/s²)
= 19154 N
= 19.154 kN
Answer: 19 kN (nearest integer)
<em>Answer:</em>
There are two major resonance contributors for the en-amine. One contributor have no formal charges, only have one lone pair at N while the other one has positive and negative formal charges.
<em>Explanation:</em>
An en-amine is formed by the condensation reactions of aldehydes or ketone with secondary amine.
The contributor<em> </em>I have no formal charges. It has only one lone pair at Nitrogen atom.
The contributor II has +1 formal charges at N, and -1 formal charges at α Carbon.
Please see attachment. The resonance contributor are given.