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Vedmedyk [2.9K]
3 years ago
13

How many electrons are in an Sn+2 ion?

Physics
2 answers:
storchak [24]3 years ago
7 0
48

----------------------
Veseljchak [2.6K]3 years ago
6 0

Sn is Tin which has 50 atomic number

it means it has 50 electrons in its outer shells

+2 shows its valency

plus sign comes when electrons are removed from an atom

so here 2 electrons are removed from Sn atom

remaining electrons are 50-2

48 electrons

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How many wavelengths of a wave pass a point if the frequency of the wave is 4 hertz?
stepan [7]
Four of them pass a point every second.
3 0
3 years ago
Two 25.0N weights are suspended at opposite ends of a rope that passes over a frictionless pulley. What is the tension in the ro
goldenfox [79]

Answer:

tension in rope = 25.0 N

Explanation:

  • Two forces act on the suspended weight. The force coming down is the gravitational force and the upward force by the tension in the rope.
  • Since the suspended weight is not accelerating so that the net force will be zero. Therefore the tension in the rope should be 25 N.

       ∑F = F - W = 0

       so

       F = W

       so tension in rope = F  = T  = 25 N

8 0
3 years ago
A car accelerates from rest for 8.0 s, and reaches a speed of 66 m/s. How far will the
PSYCHO15rus [73]

Answer: C

Explanation:

Find the acceleration using this kinematic equation:

v_f=v_i+at\\66=0+a*8\\a=8.25m/s^2

Now use this kinematic equation to find the displacement:

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3 0
3 years ago
Hey guys, i'm at 10 grade at school i have a physics question about stress tension and young modulus ? Please this is my questio
makvit [3.9K]
Use the eq. of Young modulus Y=(F/A)/(∆l/lo)
dimana ∆l is the elongation of wire, lo is its initial length.
So ∆l = (F/A)lo/Y.
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5 0
3 years ago
In a pool game, the cue ball, which has an initial speed of 3.0 m/s, make an elastic collision with the eight ball, which is ini
zhenek [66]

Explanation:

Given

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Let u be the initial velocity and v_1 , v_2 be the final velocity of 8 ball and cue ball respectively

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The angle after which cue ball is deflected is given by

\theta _1=90-40=50^{\circ}

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we get v_2=1.912 m/s

v_1=2.27 m/s

5 0
3 years ago
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