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ryzh [129]
3 years ago
12

Why cant humans live off sunlight​

Chemistry
1 answer:
Liula [17]3 years ago
3 0
They will have no air and no energy or food. No food for animals, so animals die, and humans die with the lack of food, meat and plants
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In a 35.0 L tank of N2O3 at STP, how many molecules are there?​
likoan [24]

Answer:

9.40x10^{23}molecules

Explanation:

Hello!

In this case, since we are given the volume of N2O3 and pressure and temperature for the STP (1.00 atm and 273.15 K), we can compute the moles, considering the ideal gas equation as shown below:

PV=nRT\\\\n=\frac{PV}{RT} \\\\n=\frac{1atm*35L}{0.08206\frac{atm*L}{mol*K}*273.15K}\\\\n=1.56mol

Now, by using the Avogadro's number it is possible to compute the molecules of this case in 1.56 moles:

molecules=1.56mol*\frac{6.022x10^{23}}{1mol} =9.40x10^{23}molecules

Best regards!

5 0
3 years ago
A 10​-liter ​[l] flask contains 1.4 moles​ [mol] of an ideal gas at a temperature of 20 degrees celsius ​[degrees​c]. What is th
Lynna [10]

The pressure in the flask is 3.4 atm.

<em>pV</em> = <em>nRT </em>

<em>T</em> = (20 + 273.15) K = 293.15 K

<em>p</em> = (<em>nRT</em>)/<em>V</em> = (1.4 mol × 0.082 06 L·atm·K⁻¹mol⁻¹ × 293.15 K)/10 L = 3.4 atm

4 0
3 years ago
Read 2 more answers
How much heat does it take to raise 100g of aluminum (c= .9 J/gC) from 12.5C to 31C?
zlopas [31]

Answer:

When two substances having different temperatures are introduced or kept together, heat energy, Q, flows from a substance at higher temperature to a substance at lower temperature. Also, heat continues to be transferred until their temperatures are equalized, at which point the substances are in thermal equilibrium. In a closed system, the amount of energy lost is equal to but opposite the amount of energy gained.

Explanation:

5 0
3 years ago
1. The sodium-iodide symporter plays a role in the accumulation of iodide in the thyroid gland. Here, one iodide gets converted
Serggg [28]

Answer:(1) 6 sodium ions

(2)The movement of iodide ions occurs in the same direction as the sodium ions.

Explanation: Sodium-iodide symporter actively transports 2 sodium ions together with one iodide ions across the basement membrane into the thyroid follicular cells.(therefore for production of a single molecule of T3 3×2=6 sodium ions)This system utilises the concentration of sodium ions so that iodide ions can move against its concentration gradient.

6 0
3 years ago
ANSWER THIS TO BE MARKED BRAINILEST Water in a beaker measures 250 milliliters. A rock is completely submerged in the water. The
Dovator [93]

Answer:

125 cubic meters

Explanation:

Subtract 375-250=125 cubic meters

5 0
3 years ago
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