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emmainna [20.7K]
3 years ago
12

What kind of energy is required for photosynthesis to occur?

Chemistry
1 answer:
MrMuchimi3 years ago
5 0
A. Solar Energy

Hope this helps!
STSN
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In a sulphuric acid (h2so4) - sodium hydroxide (naoh) acid-base titration, 17.3 ml of 0.126 m naoh is needed to neutralize 25 ml
katen-ka-za [31]
The balanced equation for the neutralisation reaction is as follows
2NaOH + H₂SO₄ ---> Na₂SO₄ + 2H₂O
stoichiometry of NaOH to H₂SO₄ is 2:1
the number of moles of NaOH reacted  - 0.126 mol/L  x 0.0173 L = 0.00218 mol
if 2 mol of NaOH reacts with 1 mol of H₂SO₄ 
then 0.00218 mol of NaOH reacts with - 0.00218 / 2 = 0.00109 mol of H₂SO₄ 
molarity is the number of moles of solute in 1 L solution
therefore if 25 mL contains - 0.00109 mol 
then 1000 mL contains - 0.00109 mol / 25 mL  x 1000 mL = 0.0436 mol/L
therefore molarity of H₂SO₄ is 0.0436 M
4 0
3 years ago
How does cold water affect the speed of dissolving?
sineoko [7]

Answer:

Anything that can be done to increase the frequency of those collisions and/or to give those collisions more energy will increase the rate of dissolving.

Explanation:

depended on the temperature

4 0
3 years ago
Which step in the scientific method is conducted before a controlled experiment?
ycow [4]
You should always do A. form a hypothesis before performing an experiment also the other options cannot happen until after an experiment.
4 0
3 years ago
Maria took a walk to the store, did some shopping, and then came home. During Maria's trip, when was her displacement equal to z
velikii [3]
I would say it would be a. It makes the most sense
6 0
3 years ago
If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a
vladimir1956 [14]

Answer:

Physical change

Explanation:

Physical change -

It is the type of reversible change , where there is change in the state of the matter , is referred to as a physical change .

There is no chemical process involved during state change , i.e. , no new substance is formed .

Hence , from the given statement of the question, the correct term is physical change.

3 0
3 years ago
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