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aalyn [17]
3 years ago
15

In the gizmo what light intensity in CO2 level do you think will maximize the rate photosynthesis

Chemistry
1 answer:
Phoenix [80]3 years ago
8 0
<span>Carbon dioxide is one of the important factor in photosynthesis. It helps photosynthesis to take place and it will increase its rate provided the Oxygen supply level at night remains constant.It would probably keep increasing up to 100 percent assuming the light was on. The plant probably needs O2 at night. They generally don't make greenhouses more than about 1000 ppm because the improvement isn't worth the cost of pumping in all that extra CO2. The amount of light that the plant absorbs limits the benefit so it won't increase in proportion to the amount of CO2 past a certain point. It wouldn't be much improvement past about 5000 ppm from what I have heard before.</span>
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What is the pH of a solution that has a hydroxide ion concentration of 1.0×10−9 M?
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Answer:

\boxed{\text{pH = 5.00}}

Explanation:

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pOH =-log(1.0 × 10⁻⁹)

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Step 2. Calculate the pH

pH + pOH = 14.00

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Answer:

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but we also know that the ΔH rxn is calculated by accounting   the sum of number of bonds formed and bonds broken as follows:

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where H is the bond enthalpy .When bonds are broken H is positive, and negative when formed,  in the product there are 6 N-H bonds , and in the reactants 4 N-H and 1 H-H bonds).

Consulting an appropiate reference handbook or table the following values are used:

ΔHºf (NH3) = -46 kJ/mol

ΔHºf (N2H4) = 95.94 kJ/mol

(The enthalpy of fomation of hydrogen in its standard state is zero)

H (N-H) = 391 kJ

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H (N-N) = ?

So plugging our values:

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-187.40 kJ = 6(-391 kJ) + 4 (391 kJ) + 432 +  H(N-N)

-187.40 kJ = -350 kJ + H(N-N)

H(N-N) = 162.6 kJ

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