Which of the following describes an energy transformation from chemical to electrical to light energy?

2 answers:

6 0

The answer is B. a flashlight uses a battery to operate.

The battery represents the chemical energy. This is converted into electricity, which is converted into light energy.

Mamont248 [21]2 years ago

6 0

The answer is B. If you look for it or read carefully you get the answer

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How is electrolysis most commonly used to produce an energy source?

elena-s [515]

Answer:

Splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. ( B-)

4 0

3 years ago

Write the net ionic equation:. . A solution of diamminesilver(I) chloride is treated with dilute nitric acid

zimovet [89]

Ag(NH3)2Cl + 3HNO3 = AgNO3 +2NH4NO3 + HCl 
or
Ag(NH3)2Cl + HNO3 = Ag(NH3)2NO3 + HCl this the complete balanced equation
now remove spectator ions to get net ionic equation
so

 2H+ + 2NO3- + [Ag(NH3)2]+ Cl- -> AgCl + 2NH4+ + 2NO3- 2NO3- 2H+ [Ag(NH3)2]+ + Cl- -> AgCl + 2NH4+
hope it helps

5 0

3 years ago

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Who performed the oil-drop experiment?

evablogger [386]

In the year 1909, Robert A. Millikan and Harvey Fletcher performed the oil drop experiment.

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3 years ago

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Combustion vapor-air mixtures are flammable over a limited range of concentrations. The minimum volume % of vapor that gives a c

DochEvi [55]

Combustion equation of n-hexane:

2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

a)
Assuming we have 100 moles of air,
Oxygen = 20.9 moles
n-hexane required = 20.9/19 x 2
= 2.2 moles

LFL = Half of stoichometric amount = 2.2 / 2 = 1.1
LFL n-hexane = 1.1%

b)
1.1 volume percent required for LFL

1.1% x 1
= 0.0011 m³ of n-hexane required

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3 years ago

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What word or two-word phrase best describes the shape of the hydrogen cyanide ( hcn ) molecule?

elena-14-01-66 [18.8K]

Answer : Linear

Explanation : Hydrogen Cyanide (HCN) when drwan in the Lewis diagram shows carbon atom at the center with no lone electron pairs.

The carbon and nitrogen atoms are bonded through a triple bond which counts as "one electron pair".

The molecule has two electron pairs in all and appears to be linear.

Also, according to the VSEPR theory; the electron clouds on atoms around the carbon will try to repel each other.

They will get pushed apart, which gives HCN molecule a linear molecular geometry or shape.

The bond angle that is developed will be 180 degrees since it has a linear molecular geometry of HCN. The hybridisation observed in this molecule is SP.

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3 years ago

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