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makkiz [27]
3 years ago
6

Which option accurately describes the first two stages of photosynthesis?

Chemistry
1 answer:
Lemur [1.5K]3 years ago
4 0

Answer;

A) Stage 1: Chlorophyll captures light energy. Stage 2: Light energy is converted to chemical energy.

Explanation;

-Photosynthesis is the process by which green plants use energy from the sun, water and carbon dioxide to make organic compounds such as simple sugars together with release of oxygen.

-The process occurs in tow stages; light-dependent stage and light independent stage. During light dependent stage, chlorophyll absorbs sunlight and uses it to split water molecules into hydrogen ions and oxygen atoms. In the light independent stage carbon (iv) dioxide is fixed and the result is organic compound; the light energy is converted to chemical energy.

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A charged object (like a balloon that's been rubbed on the wall) cant attract an object with a net neutral charge (neither posit
UNO [17]

Answer: A balloon is charged by a process of frictional charging and the object is getting charged by the process of induction.

Explanation:

When two bodies are rubbed against each other, charging by friction or rubbing occurs. The electropositive object loses electrons to electronegative object. Thus, when balloon is rubbed on a wall, it becomes charged.

The charged balloon is able to attract an uncharged object by inducing charge on it without the two objects touching each other. Electrostatic force acts between two charged objects. Charged balloon causes electrons to move at one end thereby inducing opposite charge in the object and thus, charged balloon is able to attract uncharged object.

4 0
4 years ago
Lizzie is pushing Alex on a scooter. Lizzie is pushing with 75 N of force to the left,
Jlenok [28]

Answer:

95 N

Explanation:

they are both pushing in the same direction so you simply add

75+20=95

7 0
3 years ago
We add a 1.20-g sample of dry ice to a 755-mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 725mmHg
yaroslaw [1]

Answer:

Total pressure is 1396 mmHg

Explanation:

By:

PV/RT = n

It is possible to obtain the initial moles of nitrogen gas, where:

P is pressure (725 mmHg = 0,954 atm)

V is volume (0,755L)

R is gas constant (0,082atmL/molK)

T is temperature (25,0°C = 298,15 K)

Replacing:

n = 0,02946 moles of nitrogen gas.

The moles of dry ice (CO₂; molar mass= 44,01 g/mol) are:

1,20 g × (1mol/44,01g) = 0,02727 moles of dry ice.

When dry ice sublimes, total moles are:

0,02727 + 0,02946 =<em> 0,05673 moles</em>

With the temperature (25,0°C = 298,15 K) and volume (0,755L) it is possible to obtain total pressure, thus:

P = nRT/V

Replacing:

P = 1,837 atm × (760 mmHg/1atm) = <em>1396 mmHg</em>

<em></em>

I hope it helps!

3 0
4 years ago
which of the following enthalpy diagrams represent exothermic reactions? Endothermic reactions? please state which one each diag
Wittaler [7]

Answer:

a,c and d are exothermic

b is the endothermic

Explanation:

exothermic because energy required to form products is less than the energy required to break bonds in reactants.

endothermic because energy required to form products is larger than the energy required to break bonds in reactants.

5 0
2 years ago
A 850.0 mL cylinder containing B2H6 at a pressure of 0.900 atm is connected by a valve to 1000 mL cylinder containing C6H6 at 60
8_murik_8 [283]

Answer:

The partial pressure of C_6H_6 when the valve is opened is 328.6 Torr.

Explanation:

Initial pressure of the C_6H_6=P_1=608.0 Torr

Initial volume of the C_6H_6=V_1=1000 mL

After opening the valve :

Final pressure or partail pressure of the C_6H_6=P_2

Final volume of the C_6H_6=V_2=1000 mL+850.0 mL=1850.0 mL

P_1V_1=P_2V_2 ( Boyle's law)

P_2=\frac{608.0 Torr \times 1000 mL}{1850.0 mL}=328.6 Torr

The partial pressure of C_6H_6 when the valve is opened is 328.6 Torr.

4 0
3 years ago
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