CHEMISTRY HIGH SCHOOL

If the momentum of a car is reduced by half, assuming mass did not change, what must also have been reduced by half?

Answers

Answer 1

Answer:

Answer:

Velocity is halved

Explanation:

Momentum is contingent on mass and velocity. The quantity of motion in a body is called the momentum of the body.

Momentum = mass x velocity

Now, if mass does not change and momentum is reduced by half, it suggests that the velocity was reduced by half.

Velocity is directly related to momentum.

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What similarities do nuclear energy and chemical energy share?

Answers

atoms can be the source of both nuclear and chemical energy. Nuclear energy involves the atom's nucleus; chemical energy involves the atom's electrons—subatomic particles that surround the nucleus.

Both are types of potential energy, and Involve stored energy.

14 Which phrase describes a molecule of CH4, in terms of molecular polarity and distribution of charge?(1) polar with an asymmetrical distribution of charge(2) polar with a symmetrical distribution of charge
(3) nonpolar with an asymmetrical distribl1tion of charge
(4) nonpolar with a symmetrical distribution of charge

Answers

Answer: option (4) non polar with symmetrical distribuition of charge.

Justification:

1) First you have to study the presence of dipoles.

The dipoles are polar bonds with separation of positive and negative charges.

The dipoles are formed when two different atoms each with different electronegativity form a polar bond.

In this case the chemical bonds are between C and H, i.e. C - H.

The elecronegativity of C is 2.55 and the electronegativity of H is 2.20, then the difference is 2.55 - 2.20 = 2.30. This is a small difference so the C - H bonds is generally considered non polar.

2) Now look at the geometry of the molecule.

The four C atom is at the center and the four C - H bonds around the C atom form a molecule completely symmetrical, and any charge would distributed symmetrically.

The correct phrase describing a molecule of $\text{CH}_4$ in terms of molecular polarity and distribution of charge is $\boxed{\left( 4 \right){\text{ nonpolar with a symmetrical distribution of charge}}}$ .

Further Explanation:

Electronegativity difference is the major factor in order to govern whether the bond is polar or nonpolar. In other words, it determines the polarity of any chemical bond. A molecule is called polar if there exists an electronegativity difference between the bonded atoms. A molecule is called nonpolar if it has no or very less electronegativity difference between its atoms.

Symmetry of the molecule is also useful for the determination of polarity of any bond. If the shape of the molecule is symmetrical, it has no polarity. But if asymmetry is present in the molecule, it is said to be nonpolar.

The formula to calculate the electronegativity difference between C and H in ${\text{C}}{{\text{H}}_{\text{4}}}$ molecule is as follows:

${\left( {{{\Delta EN}}} \right)_{{\text{C - H}}}} = {\left( {{\text{EN}}} \right)_{\text{C}}} - {\left( {{\text{EN}}} \right)_{\text{H}}}$ …… (1)

Here,

${\left( {{{\Delta EN}}} \right)_{{\text{C - H}}}}$ is the electronegativity difference between C and H atoms.

${\left( {{\text{EN}}} \right)_{\text{C}}}$ is the electronegativity of carbon.

${\left( {{\text{EN}}} \right)_{\text{H}}}$ is the electronegativity of hydrogen.

The electronegativity of C is 2.5.

The electronegativity of H is 2.1.

Substitute these values in equation (1).

$\begin{aligned}{\left({{\Delta EN}}} \right)_{{\text{C - H}}}} &= 2.5 - 2.1\n&= 0.4\n\end{aligned}$

The electronegativity difference between C-H bonds in ${\text{C}}{{\text{H}}_{\text{4}}}$ is 0.4, which is quite low. So ${\text{C}}{{\text{H}}_{\text{4}}}$ is a nonpolar molecule.

In ${\text{C}}{{\text{H}}_{\text{4}}}$ , the position of hydrogen atoms is symmetrical with respect to that of the central carbon atom (For structure, refer to the attached image). So this molecule has a symmetrical distribution of charge.

Learn more:

Which type of bond is formed between water molecules? brainly.com/question/1059245
How many covalent bonds can nitrogen form if each unpaired electron participates in bonding? brainly.com/question/6029316

Answer details:

Grade: High School

Chapter: Ionic and covalent compounds

Subject: Chemistry

Keywords: nonpolar, polar, symmetry, electronegativity difference, 2.5, 2.1, 0.4, low, CH4, electronegativity of C, electronegativity of H.

Plz can someone help with this I don't understand how the answer is 3000dm3
Thanks

Answers

Combustion of octane is:
C8H18 + 25/2O2 -> 9H2O + 8CO2

You are given 10 moles of octane and you are required to find the volume of octane

10 moles C8H18 (25/2 moles O2/ 1 mole C8H18) = 125 moles O2

V = 125 moles O2 ( 24 dm3 / 1 mole of gas)
V = 3000 dm3

Current flowing in a circuit depends on two variables identify these variables and their relationship to current

Answers

as the electrons are pushed more by the battery, they move faster through the circuit

Final answer:

The current in a circuit is governed by voltage and resistance, as dictated by Ohm's Law. The voltage-current relationship can be linear in ohmic materials or nonlinear in non-ohmic materials.

Explanation:

The current flowing in a circuit depends primarily on two variables: voltage and resistance. This relationship is defined through Ohm's Law, which states that the current (I) in a circuit is equal to the voltage (V) divided by the resistance (R), or I=V/R.

When the voltage increases while the resistance remains constant, the current will increase. Conversely, when the resistance increases while the voltage remains constant, the current will decrease. Thus, for example, if the resistance doubles, the current is cut in half.

However, it is important to note that not all materials follow this linear relationship. Some materials, known as ohmic materials, follow Ohm's Law, while others, known as non-ohmic materials, exhibit a nonlinear voltage-current relationship.

Learn more about Ohm's Law here:

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The number of protons in one atom of an element determines the atom’s?

Answers

The number of protons in one atom of an element determines the atom’s atomicnumber.

What is atomic number?

The atomicnumber is the number of protons present basically in an atom's nucleus. The number of protons characterize the individuality of an element i.e., an element with 6 protons is a carbonatom, no matter however many neutrons may be prevalent.

The massnumber of an element is determined by the number of protons and neutrons combined: mass number = protons + neutrons.

To determine the number of neutrons in an atom, subtract the number of protons, or atomic number, from the mass number.

The atomic number is the number of protons in a nucleus that always equals the number of electrons in orbit around that nucleus (in a nonionized atom).

Thus, it can be concluded that the atomicnumber is determined by the number of protons in atom.

For more details regarding atomic number, visit:

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The number of protons in one atom of an element determines the atom's identity, and the number of electrons determines its electrical charge. The atomic number tells you the number of protons in one atom of an element. It also tells you the number of electrons in a neutral atom of that element.

At STP fluroine is a gas and iodine is a solid, this observation can be explained by the fact fluroine has a .. ?a. weaker intermolecular forces of attraction than iodine
b. stronger intermolecular forces than iodine
c. lower average kinetic energy than iodine
d. higher average kinetic energy than iodine

Answers

A seems to be the best Answer

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