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mylen [45]
4 years ago
13

Magnesium element has three isotopes: 24Mg, 25Mg, and 26Mg. The natural abundance of the isotopes on Earth is 78.99% 24Mg with a

mass of 23.985 amu, 10.00% 25Mg with a mass of 24.985 amu, and 11.01% 26Mg with a mass of 25.9825 amu. What is the average atomic mass of magnesium?
Chemistry
1 answer:
Dafna11 [192]4 years ago
3 0

Answer:

24.305 to the nearest thousandth.

Explanation:

That is 0.7899*23.985 + 0.10* 24.985+0.1101*25.9825

= 24.305.

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A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centri
Helga [31]
The answer is 80 m.

Centripetal force (F) is a force that makes body move around a circular curve. The unit of force is N (N = kg * m/s²).
It can be represented as:
F= \frac{m* v^{2} }{r}
where:
m - mass
v - velocity
r - radius of the curve

We have:
m = 1,200 kg
V = 20 m/s
F = 6,000 N = 6,000 kg * m/s²

We need radius of the curve:
r = ?

So, if <span>F= \frac{m* v^{2} }{r}, then:
</span>    r= \frac{3* v^{2} }{F}
⇒ r =  \frac{1200 kg * (20m/s)^{2} }{6000 kg*m/s^{2} }
⇒ r= \frac{1200*400*kg*m^{2}*s^{2}  }{6000kg*m/s^{2} }
⇒ r= \frac{480,000m}{6000}
⇒ r=80m


6 0
4 years ago
If pressure is held constant and a gas is heated, what will happen to the volume of the gas?
Galina-37 [17]

Answer:

The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).

5 0
3 years ago
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aleksklad [387]

Answer:

Explained below.

Explanation:

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Andre45 [30]
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