CHEMISTRY HIGH SCHOOL

A solution with a pH of 2.0 has a hydronium ion concentration ten times greater than a solution with a pH of(1) 1.0 (3) 3.0
(2) 0.20 (4) 20.

Answers

Answer 1
Answer:

Answer:The correct answer is (3).

Explanation:

The pH of the solution is defined as negative logarithm of H^+ or hydronium ions ions in the solution.

pH=-\log[H^+]

2=-\log[H^+]

[H^+]=0.01 M

The pH with 10 times the concentration H^+ ions.

[H^+]=10* [H^+]'

pH=-\log[H^+]'=-\log[(0.01)/(10)]=3

Hence, the correct answer is (3).
Answer 2
Answer: The answer is (3) 3.0. The solution with a pH of 2.0 has greater concentration means the other solution has greater pH. pH=-lg[H+]. So we can get the pH of other solution is 3.

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Isooctane has the molecular formula C8H18. What is its empirical formula

Answers

Answer:

Its empirical formula is C_(4)H_(9)

Explanation:

The empirical formula of a compound has the relative number of atoms in the molecule, expressed in the simplest whole-number ratios.

We know that the molecular formula of Isooctane is :

C_(8)H_(18)

If we want to obtain the empirical formula we need to simplify the numbers ''8'' and ''18'' to obtain the simplest whole-number ratios.

If we do this, we find that ''8'' can be simplified by 8,4,2 or 1.

The number ''18'' can be simplified by 18,9,6,3 or 1.

The highest number which is common to ''8'' and ''18'' is the number 2.

If we simplify the molecular formula of Isooctane by 2 ⇒

C_(8)H_(18) ⇒C_(4)H_(9)

The empirical formula of Isooctane is C_(4)H_(9)
GOSH I feel the pain. 
Finding the empirical formula starting from the molecular formula is pretty much finding a least common factor for the subscripts. 8 and 18 can both reduce by two, making it C4H9. 

How do plants store glucose?

Answers

The model of photosynthesis used by biologists begins when chlorophyll splits a water molecule into hydrogen and oxygen. The oxygen from the water is a waste product that is released as a gas. In later stages of photosynthesis, carbon dioxide from the air and hydrogen from the water unite to form glucose. Photosynthesis usually takes place in the leaves of green plants. The food produced is a simple sugar called glucose. Some of the food made during  photosynthesis is used by plants for their growth and development. The rest is stored in the plant.

List and describe two powerful forces of nature caused by plate tectonics

Answers

Earthquakes and Volcanoes. they are caused by them movung against or away from each other.
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The crystal lattice structure of ionic compounds is responsible for which set of characteristic properties?

Answers

Answer:

The characteristic properties are hard and brittle solids having high melting and boiling point

Explanation:

Ionic compounds are the type of chemical compounds that are formed by ionic bonding. An ionic compound is composed of two oppositely charged ions that are held together by electrostatic forces of attraction.

They are solids at room temperature and usually have a crystalline structure and have high melting and boiling point. Ionic compounds are hard but also brittle.

If your using Plato the answer is E.

What do atoms form when they bond chemically?a. atom
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Answers

They form molecules which can be in solution form if diluted in water, but some do form solutions on exposure to the atmosphere i.e they are deliquescent like pellets of sodium hydroxide

Suggest two reasons why the UK government wants to encourage recycling of iron and steel......

Answers

The two reasons why the UK government is encouraging citizens to recycle iron and steel is:
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2.   Economic reasons. When the ore mining and steel making is reduced in activity, the government won’t just be able to save the environment but it also save funds for other purposes.



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