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3 years ago

23 grams of sodium reacted with 35.5 grams of chlorine. Calculate the mass of the sodium chloride compound formed

2 answers:

8 0

Law of Conservation of Mass:
Mass is neither Created nor Destroyed.
So basically, the mass of any element (the example here is Sodium Chloride) at the start is = to the mass of the element at the finishing point.
We add the mass:
23+35.5=58.5g
In conclusion, the mass of Sodium Chloride formed is 58.5g
Its as simple as that!

xxTIMURxx [149]3 years ago

3 0

According to law of conservation of mass within a reaction,
The mass of the compound formed is (23+35.5) grams means 58.5 grams of sodium chloride[NaCl] will be formed.

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A football player kicks a football downfield. The height of the football increases until it reaches a maximum height of 15 yards

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A gang of robbers is escaping across city roofs at night. They come to the edge of one building and need to drop down to their g

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a) They will hit the ground with a speed of 19.6 m/s.

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Hi there!

a) The equations of height and velocity in function of time of a free falling body are the following:

h = h0 + v0 · t + 1/2 · g · t²

v = v0 + g · t

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h = height of the object at time t.

h0 = initial height.

v0 = initial velocity.

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v = velocity of the object at time t.

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v = v0 + g · t (v0 = 0)

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v = -19.6 m/s

They will hit the ground with a speed of 19.6 m/s.

b)Now, we have to use the equation of height:

h = h0 + v0 · t + 1/2 · g · t²

If we place the origin of the frame of reference on the ground, we have to find the initial height (h0) knowing that at t = 2.0 s, h = 0 m

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h0 = 20 m

They are at a height of 20 m.

c)According to a NASA paper (Issues on Human Acceleration Tolerance After Long-Duration Space Flights, figure 10), if you fall with a vertical velocity greater than 17 m/s it is unlikely that you will survive. So, it is not a safe jump.

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