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1 year ago

What is the mass of 1.6x1020 molecules of carbon dioxide?

Chemistry

1 answer:

valentina_108 [34]1 year ago

8 0

Answer:

$1.2*10^{-2} g$

Explanation:

$1 mol - 6*10^{23} particles$

$1.6*10^{20}* \frac{1 mol}{6.02*10^{23}} = 0.00026578 mol\\\\M(CO2) = 12 + 2*32=44 \frac{g}{mol}\\$

$44\frac{g}{mol} *0.00026578 mol =0.012 = 1.2*10^{-2} g$

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A 0.300 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 66,

Alja [10]

Answer:

X=600 degrees celsius

Explanation:

We can evaluate by using the equation ==> Q=m(c)(delta T)

-We know the mass is 0.3 g

-Q= 66,300 J

-C= 390 j/g 0C

-Therefore, we need to solve for delta T (which will be represented by x)

Q= mct

66,300 J= 0.3 g (390 J/g 0C) (t)

The unit of measurement (g-grams) can be crossed out on the left side of our expression.

66,300 J=0.3(390 J 0C) (t)

-If we convert into a proportional relationship:

66,300 J 117 J/0C x

------------ = -----------

117 J/0C 117 J/0C

-Joules on both sides can be crossed off

*117 J/0C came from the product in terms of 0.3(390 J 0C)

*If we find the quotient of 66,300 J and 117 J/0C, we get 566.6 repeating

-You may keep the answer as it is, although for simplicity reasons, we can round to the nearest hundred.

-Therefore, x=600.

-----Remember, x represented the delta t in our equation. (I made notice of that when evaluating).

Hope this helps! :)

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1 year ago

Which processes occur during the second stage of technological design? Check all that apply.

Lena [83]

There is four stages of technological design:1. identify a problem or need.2. design a solution.3. implement, build, test the design.4. determine if the solution met the need.To design a solution is second stage of technological design.

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2 years ago

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A 5 mole sample of liquid acetone is converted to a gas at 75.0°C. If 628 J are required to raise the temperature of the liquid

Shkiper50 [21]

The total energy can be found by adding the different energies:
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2 years ago

Where does the energy required to break the interactions between butane molecules come from when butane boils?

Arada [10]

Answer:

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Explanation:

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2 years ago

Which of the following is the greatest speed: 20 m/s, 200 cm/s, or 0.2 km/ s

PtichkaEL [24]

20 meters per second.

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1 year ago