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mixas84 [53]
3 years ago
8

Light of a certain energy shines on a metal and causes electrons to be emitted.

Chemistry
2 answers:
sashaice [31]3 years ago
8 0

your answer is: the use of that light has a lower frequency

Inessa [10]3 years ago
6 0

Light of certain energy shines on a metal and causes electrons to be emitted. Based on the research of Albert Einstein, the change that would most likely result in stopping the emission of electrons from this metal is to coat the metal.

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Which of the following types of stars is the coolest?
Solnce55 [7]
Idk you didn't be very specific 
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4 years ago
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How can the gravitational potential energy of an object be changed?
Aleksandr [31]

Answer:

Gravitational potential energy may be converted to other forms of energy, such as kinetic energy. If we release the mass, gravitational force will do an amount of work equal to mgh on it, thereby increasing its kinetic energy by that same amount (by the work-energy theorem).

Explanation:

7 0
3 years ago
Which of the following shows the balanced equation for the reaction that represents the decomposition of magnesium chlorate (Mg(
AfilCa [17]

Answer:

Mg(ClO₃)₂ ⟶ MgCl₂ + 3O₂

Explanation:

The reaction gives magnesium chloride and oxygen.

The balanced equation is then

Mg(ClO₃)₂ ⟶ MgCl₂ + 3O₂

A is <em>wrong</em>, because it is not balanced (12 O atoms on left and 6 O atoms on right).

C and D are <em>wrong</em> because they have the reactants as products and vice versa.

5 0
3 years ago
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Explain how paper chromatography could be used to separate a mixture of different coloured inks
GuDViN [60]

Answer:

Chromatography is a method of separation of materials from a mixture. Paper chromatography is a technique of separation where, paper used as a stationary phase and solvent used to separate the sample used as a mobile phase. The sample is applied over the paper in small quantity. The components of the sample separates in a chromatographic paper due to the movement of solvent. The components of the sample moves with the solvent.

Paper chromatography is a useful technique for ink analysis. Ink consists of several dyes, which can be separated individually. When the ink is exposed to certain solvent mixtures the dyes of the ink dissolves in the mixture. Each ink components acquire distinct distance according to the retention factor. Some inks are water soluble, so the solvent used for separation should be water. Inks which are not water soluble are soluble in other solvents like alcohol.

3 0
3 years ago
Which compound is a saturated hydrocarbon? propanal propane propene propyne?
Lyrx [107]

Hydrocarbons are chains of C and H. C and H are held together by covalent bonds.

hydrocarbons are of three main types

alkanes - only single bonds between C atoms

alkenes - double bonds between C atoms present

alkynes - triples bonds between C atoms present


saturated hydrocarbons definition is when there are only single bonds present


from the given compounds

propane - only single bonds

propene - double bond

propyne - triple bond

propanal - double bond between C and O


only compound with single bonds is propane

answer is propane


7 0
3 years ago
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