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4 years ago

Question in picture below

Chemistry

2 answers:

baherus [9]4 years ago

6 0

Models 1 and 2 would be the same

irina [24]4 years ago

4 0

Answer:

Models 1 and 2 would be in the same group.

Explanation:

They have the same amount of valence electrons. Valence electrons are electrons in the outermost electron cloud. This means they have the same properties, therefore are in the same Group on the periodic table.

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A hydrocarbon has the molar mass 26.04 g/mol. what is a possible formula

jonny [76]

C2H2 is the right answer I believe

6 0

3 years ago

Which of the following ions is formed when the positive hydrogen ions from an acid bond to water molecules? он- ООН- он20* ОНО*

Vesna [10]

Answer:

2ND ONE

Explanation:

5 0

3 years ago

Look at the graph of reaction rate versus substrate concentration for an enzyme. In which region does the reaction rate remain c

OleMash [197]

Answer:

The correct answer is C.

Explanation:

The reaction speed remains constant in region C. This is because the growth rate decreases, tending to zero. Graphically you can see how the slope of the tangent line approaches the horizontal. The slope of the tangent line represents the rate of reaction speed. It is constant because although the concentration continues to increase, the reaction rate does not vary.

Have a nice day!

6 0

4 years ago

Write the structural formula for a primary, a secondary, and a tertiary constitutionally isomeric alcohol of the molecular formu

9966 [12]

Answer:

The structures of all isomeric alcohols of molecular formula C5H12O along with their IUPAC names are as shown.

Their classification of primary, secondary, and tertiary alcohols are -

1-pentanol -

2-pentanol -

3-pentanol

2-methylbutan-1-ol

2-methylbutan-2-ol

3-methylbutan-2-ol

3-methylbutan-1-ol

2,2-dimethylpropanol

5 0

3 years ago

How many times greater is the hydronium ion concentration in rainfall (pH = 5.0) compared to pure water (pH = 7.0)?

joja [24]

Hydronium ion is H3O(+)

pH is log 1 / [H3O(+)] = - log [H3O(+)]

Rainfall: pH = 5.0 = - log [H3O(+)] => [H3O(+)] = -antilog (- 5.0) = 10^-5

Water; pH = 7.0 = - log [H3O(+)] => [H3O(+)] = - antilog (-7.0) = 10^ -7

Divide hidronium conentration of rainfall by hidrodium concentration of water:

10^-5 / 10^-7 = 10^2 = 100.

Then, hidronium concentration in rainfall is 100 times hidronium concentration in water.

Answer: option a. 100 times.

3 0

3 years ago