Answer:
110,4 kJ / mole of acid
Explanation:
The reaction of NaOH with H₂SO₄ is:
2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O
Moles of NaOH and H₂SO₄ are:
0,1000L×1,00M = 0,100 moles of NaOH and 0,100 moles of H₂SO₄. As 2 moles of NaOH reacts with 1 mole of H₂SO₄, moles of acid that react are 0,100/2 = 0,0500moles of acid.
The produced heat is:
Q = C×m×ΔT
Where C is specific heat capacity (4,18J/gK)
m is mass: 200,0mL×(1,00g/mL) = 200g
ΔT is change in temperature: 30,6°C - 24,0°C = 6,6°C = 6,6K
Thus, Q is:
Q = 4,18J/gK×200g×6,6K
Q = 5518J = 5,52kJ
ΔH in kJ per mole of acid:
5,52kJ / 0,0500moles of acid = 110,4 kJ / mole of acid
I hope it helps!
Answer:
false \
explaintion
then wound pond and lakes be salt water
The salt in the ocean mainly comes from runoff from the land and openings in the seafloor. So, I would say false.
Answer:
The correct, chemically balanced equation for photosynthesis is: b. 6CO2+12H2O+radiant energy -> C6H12O6+ 6H2O+6O2
Explanation:
Photosynthesis is the synthesis of a compound which is more complex than CO2, O2 and H2O. It requires the presence of radiation/sunlight. Therefore, c, d, and e are incorrect. C6H12O6 is produced in the photosynthesis, not decomposed. O2 is generated in the photosynthesis. Analyzing both a and b, the only chemically balanced equation is b. The option a has an excess of carbon that is not reflected on the right side of the equation.
Answer:
10%
Explanation:
Out of the original layer, only ten percent is transferred to the next
Control Group:
In the experiment, the Experimental Group represents ducks in cold water, while the Control Group represents ducks in room temperature water. The scientist is testing whether water temperature affects duck swimming speed.
In the experiment described, the scientist is exploring whether the temperature of the water affects the speed of swimming of ducks. The Experimental Group in this scenario represents the ducks that are swimming in cold water. The scientist expects that these ducks will swim faster, based on the original hypothesis. On the other hand, the Control Group represents the ducks that are swimming in room temperature water. This group serves a basis for comparison to help the scientist determine what changes (if any) occur when the variable (water temperature) is altered.
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