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notsponge [240]
2 years ago
13

In which molecule is hydrogen bonding most important?

Chemistry
1 answer:
Airida [17]2 years ago
4 0
The most important hydrogen bonding is the DNA.
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The combustion reaction for methane is shown below:
horrorfan [7]

Answer:

P =  14.1 atm    

Explanation:

Given data:

Mass of methane = 64 g

pressure exerted by water vapors = ?

Volume of engine = 24.0 L

Temperature = 515 K

Solution:

Chemical equation:

CH₄ + 2O₂      →      CO₂ + 2H₂O + energy

Number of moles of methane:

Number of moles = mass / molar mass

number of moles = 64 g/ 16 g/mol

Number of moles = 4 mol

Now we will compare the moles of water vapors and methane.

              CH₄          :            H₂O  

                 1            :             2

                 4            :         2/1×4 = 8 mol

Pressure of water vapors:

PV = nRT

R = general gas constant = 0.0821 atm.L/mol.K

P = 8 mol × 0.0821 atm.L/mol.K× 515 K / 24.0 L

P = 338.25 atm.L/ /  24.0 L

P =  14.1 atm      

4 0
2 years ago
In a diagnostic test for leukemia, a person receives 4.1 mL of a solution containing selenium-75. If the activity of the seleniu
Tcecarenko [31]

To solve this problem, we can simply calculate for the dose by multiplying the volume of solution containing Selenium 75 and the activity of the Selenium 75. That is:

dose = 4.1 mL * (45 μCi/mL)

dose = 184.5 μCi

8 0
3 years ago
Read 2 more answers
Can someone help me with this please
dusya [7]
Boiling water: It starts bubbling and it becomes hot
Baking Cake: The cake becomes soft and not liquid
Burning Wood: The wood burns and turns into ash
Painting Door: The color changes and the wood numbs slightly

Hope this helps!
STSN
6 0
3 years ago
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Using the correct answer from Part B, calculate the volume of a rectangular prism with a length of 5.6 cm, a width of 2.1 cm, an
Alenkinab [10]
5.6 x 2.1 x 6.6 = 77.616 cm3
5 0
3 years ago
Heat required to raise 1 g of a substance 1°C
Oksana_A [137]

Answer:

Specific heat

Explanation:

7 0
3 years ago
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