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Allushta [10]
3 years ago
10

Oi oi oi oi ewin .................

Chemistry
1 answer:
KatRina [158]3 years ago
7 0
Muy bein me gusta hope this makes you smile
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Which is NOT a reason why organisms communicate with one another?
Tpy6a [65]

Answer:

C. to find housing.

Explanation:

i hope this helps :)

3 0
3 years ago
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Who introduces the concept of atomic number?
aleksley [76]
Henry Moseley developed the concept of atomic numbers.
4 0
3 years ago
The enthalpy of formation of liquid ethanol (c2h5oh) is −277.6 kj/mol. what is the equation that represents the formation of liq
jeyben [28]
The enthalpy of formation has a negative sign, which means that the reaction is exothermic. In other words, when ethanol is formed, heat is released to the surroundings as a by-product. The reaction for the formation of ethanol is written below:

<em>C₂H₄ + H₂O → C₂H₅OH</em>
7 0
3 years ago
A flask contains 2.0 mol of He gas at 25°C and 1.00 atm. How much He gas, in grams, must be added to increase the pressure to 2.
katrin [286]

Answer:

Mass of He required = 8.0 g

Explanation:

Given,

Initial moles of He = 2.0 mol

Initial pressure = 1.00 atm

final pressure = 2.00 atm

Ideal gas equation,

PV = nRT

As V, R and T are constant

So, \frac{P_1}{P_2} =\frac{n_1}{n_2}

\frac{1.00 atm}{2.00 atm} =\frac{2.0}{n_2}\\n_2=\frac{2.0\times 2.00}{1.00} \\n_2=4.0 mol

Molar mass of He = 4.00 g/mol

No. of moles of He needs to be added = 4.0 - 2.0 = 2.0 mol

Mass = No. of mole × Molar mass

         = 2.0 × 4.0

          = 8.0 g

3 0
4 years ago
What is 60 kilos in stones and pounds?
Ipatiy [6.2K]
In stones:

1 kg ------------ 0.157473 stones
60 kg ---------- ??

60 x 0.157473 / 1 => 9.44838 stones
_______________________________________

in pounds:

1 kg ----------------- 2.20462 pounds
60 kg --------------- ??

60 x 2.20462 / 1 => 132.277 pounds
_____________________________________

hope this helps!
6 0
3 years ago
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