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3 years ago

How can I get better at Chemistry? give me answers, legal or illegal.

Chemistry

1 answer:

Alexus [3.1K]3 years ago

3 0

Answer:

this subject takes time. i would study nonstop. past year i was 1 of 10 that passed our chemistry class with 200 people in it. it just takes time

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A gas at 89C occupies a volume of 0.67 L. At least what temperature will the volume increase to 1.12 L

dybincka [34]

At temperature 332.13 °C

<h3>Further explanation</h3>

Charles's Law stated that :

When the gas pressure is kept constant, the gas volume is proportional to the temperature

$\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}$

T₁ = 89 °C=89+273=362 K

V₁ = 0.67 L

V₂ = 1.12 L

$\tt T_2=\dfrac{V_2.T_1}{V_1}\\\\T_2=\dfrac{1.12\times 362}{0.67}=605.13~K=332.13~^oC$

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3 years ago

Calculate the electronegativity difference of CH3OH

Maru [420]

You can't calculate the electronegativity difference of a single molecule you'll need a frame of reference to explain the electronegativity difference and properties arising due to the difference. Another term arise here is modified electronegativity that is calculated within the molecule between two atoms of different electronegativity and use to explain the nature of molecule wether they are electron withdrawing group or electron donating group and also used to compare the electronegativity with other molecule!

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3 years ago

What is the volume of a salt crystal measuring 2.44 × 10–2 m by 1.4 × 10–3 m by 8.4 × 10–3 m?

Dima020 [189]

All solids have an orderly internal structure with repeating bonding patterns between atoms, ions, or molecules. They are called crystal lattices. They are a 3-dimensional arrangement of atoms inside a crystal. The volume of this crystal is:
<span>
Volume = 2.44 × 10^–2 m x 1.4 × 10^–3 m x 8.4 × 10^–3 m = </span>2.87 x 10^-7 m^3

6 0

3 years ago

Read 2 more answers

Why is the air pressure greater on the mountain top

Elena L [17]

Altitude is height above sea level. The density of air decreases with height. There are two reasons, at higher altitudes there is less air pushing down from above,and gravity is weaker farther from earths center.

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4 years ago

Draw the resonance structures for (SCN)".

Phantasy [73]

Answer : The resonance structure of $SCN$ is shown below.

Explanation :

Resonance structure : It is defined as when more than one Lewis structure can be drawn, the molecule or ion is said to have resonance.

Resonance is the concept where electrons (bonds) are delocalized over three or more atoms which cannot be depicted with one simple Lewis structure.

First we have to draw Lewis-dot structure.

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, $SCN$

As we know that sulfur has '6' valence electrons, carbon has '6' valence electrons and nitrogen has '5' valence electron.

Therefore, the total number of valence electrons in $SCN$ = 6 + 4 + 5 = 15

According to Lewis-dot structure, there are 7 number of bonding electrons and 8 number of non-bonding electrons.

In SCN, carbon atom is the central atom and sulfur and nitrogen are the neighboring atoms.

The resonance structure of $SCN$ is shown below.

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4 years ago