3 years ago

How many neutrons does element X have if its atomic number is 48 and its mass number is 167?

1 answer:

6 0

If its atomic number is 48, then it has 48 protons in the nucleus
of each atom. Any more mass than that is supplied by the neutrons
that are mixed in there with the protons.

If the mass is 167, and 48 of those are protons, then there are

(167 - 48) = 119 neutrons

in each nucleus.

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solniwko [45]

Answer:

The value is $y = 3.097 * 10^{-5} \ m$

Explanation:

From the question we are told that

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The 26th is Fe(iron) and the 50th is Sn(tin)

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Most of the countries in Europe use SI measurments. How could this be a problem if you went on a trip to Europe?

faust18 [17]

Not knowing how to convert the type of measurement according to your way of learning from where ever you come from.

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3 years ago

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How many electrons must be removed from each of two 5.69-kg copper spheres to make the electric force of repulsion between them

CaHeK987 [17]

Answer:

$n=3.056*10^{9} Electrons$

Explanation:

Please see attached file

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3 years ago

A 6.0 kg mass is placed on a 20º incline which has a coefficient of friction of 0.15. What is the acceleration of the mass down

Leona [35]

Answer:

Explanation:

The form of Newton's 2nd Law that we use for this is:

F - f = ma where F is the Force pulling the mass down the ramp forward, f is the friction trying to keep it from moving forward, m is the mass and a is the acceleration (and our unknown).

We know mass and we can find f, but we don't have F. But we can solve for that by rewriting our main equation to reflect F:

$wsin\theta-\mu F_n=ma$ That's everything we need.

w is weight: 6.0(9.8). Filling in:

6.0(9.8)sin20 - .15(6.0)(9.8) = 6.0a and

2.0 × 10¹ - 8.8 = 6.0a and

11 = 6.0a so

a = 1.8 m/s/s

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3 years ago