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Ad libitum [116K]
4 years ago
6

Which term refers to the movement of molecules from an area of higher concentration to an area of lower concentration

Biology
1 answer:
hammer [34]4 years ago
8 0

The answer is Diffusion

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The volume of a certain gas is 29.3 liters at STP. What would be the volume of the same gas at 1.39 atmospheres and -23.00C? (R=
Andrew [12]

Answer:

19.32L

Explanation:

Given parameters:

Volume of the gas at STP = 29.3liters;

      Using this information first, let us find the number of moles of the gas.

                  Number of moles = \frac{volume of gas}{22.4}

With the number of moles, we can further solve this problem;

                 Number of moles  = \frac{29.3}{22.4}   = 1.31 moles

More parameters;

Pressure on gas  = 1.39atm

temperature  = -23°C  = -23 + 273  = 250K

Unknown:

Volume of gas  = ?

Solution:

The ideal gas equation is the perfect fix to solve this problem.

It is mathematically expressed as;

              Pv  = nRT

where P is the pressure

           v is the volume

           R is the gas constant

            n is the number of moles

            T is the temperature

     Input the parameters;

             1.39 x V  = 1.31 x 0.082 x 250

                     V  = 19.32L

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3 years ago
Ecology question above with a picture
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Answer:

I believe the answer is B

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DNA is made of two chains of nucleotides. Which type of bonds hold the chains together? hydrogen bonds covalent bonds ionic bond
Degger [83]

The right answr is hydrogen bonds

The hydrogen bond or hydrogen bridge is an intermolecular force involving a hydrogen atom and an electronegative atom such as oxygen, nitrogen and fluorine. The intensity of a hydrogen bond is intermediate between that of a covalent bond and that of van der Waals forces.

The helices of the DNA (both strands) are maintained by hydrogen bonds.

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scientist have discovered several species of insect that are contain the DNA sequence ATTACGCGATC on their second chromosome wha
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B. common ancestry among organisms.
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HHHEEELLLPPP!!!
malfutka [58]

Answer:

D

Explanation:

Lava at Earth's surface flows over rocks.

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