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FinnZ [79.3K]
3 years ago
8

NEED ANSWER ASAP PLEASE!!!

Physics
2 answers:
o-na [289]3 years ago
6 0
<span>silicon (Si) had four valence electrons :)
</span>
iragen [17]3 years ago
3 0
The answer is Silicon. If you ever need a quick way to find out how many valence electrons an element has, look for the element's family. Of course, disregard the transition metals. They are playing their own game.
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You have two capacitors and want to connect them across a voltage source (battery) to store the maximum amount of energy. Should
meriva

Answer:

In parallel

Explanation:

Ctotal = C1 + C2 + ... + Cn

8 0
3 years ago
________ is a measure of the internal energy that has been absorbed or transferred from one body to another, often due to a diff
stich3 [128]

Answer: Heat

Explanation: Heat is a form of energy, and it is exchanged between bodys when they are not at the same temperature.

Heat is transferred from the body with higher temperature to the one with lower tempertature, this is so that in time they end up being at the same temperature.

This means that the one with lower temperature is the one who absorbs the heat, and the one with higher temperature transfer it.

4 0
3 years ago
A gas undergoes two processes. In the first, the volume remains constant at 0.200 m3m3 and the pressure increases from 2.50×105
SVETLANKA909090 [29]

Answer:

W = -4.95 \times 10^4\ J

Explanation:

given,

In first case Volume remains constant.

Work done in the first case is zero.

In Second case Volume change

V₁ = 0.2 m³

V₂ = 0.11 m³

Pressure, P = 5.5 x 10⁵ Pa

Work done = Pressure x change in volume

W = P ΔV

W = P(V_2-V_1)

W = 5.5\times10^5\times (0.11 - 0.2)

W = -4.95 \times 10^4\ J

Hence, Work done when volume changes is equal to W = -4.95 \times 10^4\ J

5 0
3 years ago
Calculate kp at 298.15 k for the reactions (a), (b), and (c) using δg°f values.
vivado [14]
(a) 2NO(g) + O₂(g) ⇄2NO₂(g)kp
(b)  2N₂O(g)⇄2NO(g) + N₂(g) kp
(c)  N₂(g) + O₂(g)⇄ 2NO(g) kp
Now A is
2NO +O₂⇄2NO₂
ΔG° =ΔG° products - ΔG reactants
=2× 51.3-(256.6)
-70.6kJ/mol.
ΔG° = -RT Inkp
-70.6 = -8.314 ×10⁻³ ˣ 298.15 ˣInkJ
InkJ = 28.48
kp=2.34 ˣ 10¹²

B is 
ΔG° = 2× 86.6 - 2 × 104.2 = -35.2
-35.2 = 8.314 × 10⁻³ ˣ 298.15 ˣInkJ
InkJ = 14.2
kp = 1.47ˣ 10⁶

C is
It is also similar
kp = 4.62 ˣ 10⁻³I
6 0
3 years ago
A boy throws a ball into the air at 10.2 m/s. Assuming that only gravity acts on the ball, how high does it rise, in m?
ozzi
Answer: 5.31 meters

Explanation: Use conservation of energy. Initial energy equals final energy. Initially, there is only kinetic energy (because height = 0 initially). At the end, kinetic energy equals 0 because at max height, there is max potential energy and the ball stops moving for a split second.

mgh = .5mv^2
Masses cancel out
gh = .5v^2
(9.8)(h) = .5(10.2^2)
Solve for h. h = 5.31 meters
5 0
3 years ago
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