Which statement is true about molecules and compounds?

Chemistry

2 answers:

OleMash [197]4 years ago

5 0

I believe B is your answer.

Hope this helps!

alexandr1967 [171]4 years ago

3 0

Answer:

Both are made of two or more atoms.

Explanation:

A compound is two elements that are mixed together, no matter the amount element that it´s in the compound, it can be from 2 atoms to thousands of tons, those are still compounds, and molecules are 2 atoms of the same element that are together, so both are made 2 or more atoms, in the case of the molecule its two atoms of the same element, and in the case of the compound is two atoms of different elements.

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Which cellular change in an organism could be inherited be the next generation?

ikadub [295]

In order for a cellular change to be inherited, this change must be present in the male gamete, or sperm or present in the female gamete, the egg or ovum. This is due to the fact that a baby is created from the fusion of an egg and sperm. Therefore, choice 2, the deletion of a single DNA base in a sperm cell of a trout, is the correct answer.

If we think about it logically, cellular changes in other parts of body should not affect the next generation. For example, if mom has skin cancer, it does not mean at all that the baby will have it as well.

4 0

4 years ago

Which of the following statements is TRUE?

Karo-lina-s [1.5K]

Answer:

The correct option is E.

Explanation:

Average speed of the gas molecules = $v_a$

$v_a=\sqrt{\frac{2RT}{M}}$

T = Temperature of the gas molecule

M = molar mass of gas molecule

R = gas constant

$v_a\propto \frac{1}{M}$

Higher the molar mass of the molecule lesser will be the speed and vice versa.

Hence, statement A is not true.

Graham's Law.

This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows the equation:

$\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}$

Larger the molar mass that larger the molecule lessor will be the effusion and vice versa.

Hence, statement B is not true.

According to Boyle's law, pressure of the gas is inversely proportional o the volume occupied by the gas at constant temperature. And same can also be observed from ideal gas law:

$PV=nRT$

$P=\frac{nRT}{V}$

$P\propto \frac{1}{V}$

Higher the pressure of the gas lower will be the volume occupied by the gas and vice versa.

Hence, statement C is not true.

With rise in temperature, effusion of gas molecule increase as kinetic energy of gas molecules increases in with increase in temperature.

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

$K=\frac{3RT}{2N_A}$