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kotykmax [81]
3 years ago
12

What is the lightest material ever created by the hands of men

Chemistry
1 answer:
lutik1710 [3]3 years ago
6 0
The world's lightest material is carbon aerogel which has a mass of only 0.16 milligram and it is even lighter than aerographite.
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The ΔH vap of a certain compound is 46.55 kJ⋅ mol−1 and its ΔS vap is 67.37 J⋅mol−1⋅K−1.
arsen [322]

690 Kelvin is the boiling point of this compound.

Explanation:

Enthalpy is the sum of internal energy and the product of pressure and volume that is how much energy is in the substance.

Entropy is the measurement of randomness and measure of thermal energy per unit of temperature.

ΔH vap of compound is 46.55 kJ⋅ mol− or  J.MOL-1

ΔS vap  is 67.37 J⋅mol−1⋅K−1.

The boiling point or temperature can be calculated by the formula:

T= \frac{ΔH vap}{ΔS vap}

T =\frac{46550}{67.37}      

  = 690 Kelvin

The boiling point is the temperature when atmospheric temperature gets equal to

4 0
3 years ago
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A typical carbon monoxide detector will sound it's alarm if it detects 0.050 g of CO, HOw many molecules of carbon monoxide are
Colt1911 [192]

Answer:

1.07×10²¹ molecules are needed to sound the alarm

Explanation:

Let's convert the mass of CO to moles, to determine the amount of molecules.

0.05 g . 1 mol / 28 g = 1.78×10⁻³ moles

Now we can determine the number of molecules with the NA

1 mol has 6.02×10²³ molecules

1.78×10⁻³ moles may have (1.78×10⁻³ .  6.02×10²³) / 1 = 1.07×10²¹ molecules

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What besides genes influences traits? PLEASE HELP!
Nat2105 [25]
Traits are determined by alleles.
4 0
3 years ago
->
never [62]

Answer:

The answer to your question is probably false

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What is (3.2x10^14) x (7.3x10^10)
Molodets [167]
So first, you would take 10 and raise it up to the 14th power. Then take 10, and raise it up to 10th power. After doing all the work, your answer should be 2.336E29.
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