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2 years ago

How many electrons are in the ππ system of borazine.

Chemistry

1 answer:

astra-53 [7]2 years ago

5 0

With 6 p electrons (2 from each nitrogen) borazine is aromatic.

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Which sequence of events is required to form a limestone cave where you can walk around and observe cave formations, such as sta

N76 [4]

Answer:

Which sequence of events is required to form a limestone cave where you can walk around and observe cave formations, such as stalactites? (Note: stalactites hang from the ceiling - they have to hold on tight to the roof.)

A geological sequence of events as involving the lowering of the water table to expose cave structures where stalactites and stalagmites form which is described as follows,

Explanation:

1. Acidic percolated water formed cavities of solution beneath the natural water table known as phreatic zone

2. After the passage of time there is a drop in the water table dropped forming caves from cavities

3. These caves, which are air filled voids that contains adequate environment for forming stalactites and stalagmites and where they are found

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3 years ago

How does an object become electrically charged?will give brainliest

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2 years ago

Completely reacting 150.0 g of a substance with oxygen releases 395.1 J of energy. How much energy would be released if 450.0 g

MrMuchimi

To solve this problem we just need to use the rule of three:
150g..................395.1J
450g................xJ

x = 450*395.1/150 = 1185,3J

450.0 g of the substance completely reacted with oxygen will produce 1.1853 kJ(<span>kiloJoule</span>)

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3 years ago

Read 2 more answers

The combustion of gasoline produces carbon dioxide and water. assume gasoline to be pure octane (c8h18) and calculate how many k

IgorC [24]

<span>Answer: 2 C8H18 + 25 O2 => 16 CO2 + 18 H2O 1.0 kg = 1000 g C8H18 = 1000 g / 114.2293 g/mole = 8.75 moles C8H18 8.75 moles C8H18 produce (16/2) (8.75) = 70 moles CO2 70 moles CO2 = (70 moles) (44.0096 g/mole) = 3081 g CO2 = 3.1 kg CO2</span>

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3 years ago

Hãy tìm công thức hóa học của những oxit có thành phần khối lượng như sau S:50%; C:42,8%; Mn:49,6%; Pb:86,6%

Novosadov [1.4K]

Answer:

Find the chemical formulas of oxides that contain the following composition:

S:50%; C:42,8%; Mn:49,6%; Pb:86,6%

Explanation:

In the given oxide of sulphur,

50%S is present that means remaining 50% is O.

Divide the % with atomic mass:

S O

50/32= 1.5625 50/16=3.125

divide with smallest ratio:

1.5625/1.5625=1 3.125/1.5625=2

Hence, the formula of oxide is $SO_2$ .

Similarly:

Carbon is 42.8% means the reamining % will be O that is 57.2%.

C O

42.8/12=3.575 57.2/16=3.575

Divide with smallest ratio:

3.575/3.575=1 3.575/3.575=1

Hence, the formula of oxide is CO.

Mn is 49.6% means the remining is % is O that is 50.4%.

First divide with atmic mass of respective element, then get the smallest ratio.

That gives the mole ratio of each constituent atom.

Mn O

49.6/55.0=0.90 50.4/16=3.15

0.90/0.90=1 3.15/0.90=3.5

Multiply with two

2 7

Hence, the formula becomes:

$Mn_2O_7$

Pb is 86.6% means ---remaining 13.4% is O.

Pb O

86.6/207 = 0.418 mol 13.4/16=0.85

0.418/0.418=1 0.85/0.418=2.0

Hence, the formula is: $PbO_2$

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2 years ago