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3 years ago

Please HELP.............................

Chemistry

1 answer:

Zanzabum3 years ago

3 0

Answer:

14. Mirror is made up of a very smooth surface, whereas wall is not made up of a smooth surface. Smooth surfaces reflect the incident light to more extent, where as rough surfaces absorb most of the incident light. Hence, the reflected light from walls can't form the image and wall can't act as a mirror.

15. Correct answer is d) About four years

16. Correct answer is b) Convex lens

Explanation:

15. If the light from the nearest star (Alpha Centauri) takes more than 4 years to reach us, we're seeing that star 4 years in the past.

16. Refracting telescopes use convex lenses, at the front of a tube, to gather and focus incoming light. The image formed is magnified for the viewer through an eyepiece lens at the back end of the tube.

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Why is the bermuda triangle deadly? or is it just a myth?

Veseljchak [2.6K]

Answer:

Its neither a myth nor deadly

Explanation:

Bizarre hexagonal clouds forming above the Bermuda Triangle may be the reason why dozens of ships and planes have mysteriously vanished in the notorious patch of sea, according to scientists.

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2 years ago

Two or more substances in variable proportions, where the composition is variable throughout are a a homogeneous mixture. b a so

REY [17]

Answer: In heterogeneous mixture, the composition remains variable throughout.

Explanation:

For the given options:

Homogeneous mixtures are defined as the mixtures that appears uniformly throughout the solution and the particle size or shapes are not different. The composition remains constant throughout.

A solution is defined as the solution in which the components gets completely dissolved in it. Particles are evenly spread in these solutions. These solution does not scatter light falling on it. The composition remains constant throughout.

An amorphous solid is defined as the solid in which the constituent particles of the matter are arranged in the random manner. The composition remains constant throughout.

A heterogeneous mixture is defined as the mixture in which component are unevenly spread throughout the solution. The size and shape of the particles differ in these mixtures. These mixture scatter the light falling on it. The composition do not remains constant throughout.

Compound is defined as the chemical specie which is formed by the combination of two or more different type of atoms. For Example: $H_2O,O_2$ etc...The composition remains constant throughout.

Hence, in heterogeneous mixture, the composition remains variable throughout.

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4 years ago

How are ionic compounds named?

telo118 [61]

Answer:

Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.

Explanation:

Hope this helps.

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3 years ago

PH is the a measure of the

wlad13 [49]

PH is the measure of concentration of OH- in the solution

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3 years ago

Read 2 more answers

Match the following items with their definitions. 1 . homogeneous a substance maintaining a uniform appearance throughout 2 . mi

Nezavi [6.7K]

Answer:

The answer to your question is:

Explanation:

1 . homogeneous a substance maintaining a uniform appearance throughout 2 . miscible the ability of liquids to be mixed together

3 . immiscible two liquids that will not mix with one another

4 . heterogeneous a mixture consisting of visibly different substances or phases

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3 years ago