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3 years ago

The cochlea is a liquid-filled cavity in the inner ear. t or f?

Chemistry

1 answer:

Vladimir [108]3 years ago

6 0

Answer:

False

Explanation:

The liquid filled cavity is called a Tympanic Cavity

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In a given population, which members are most likely to survive and produce offspring?

Aneli [31]

Answer:

Those individuals with advantageous traits are more likely to survive and reproduce. The survivors pass down these advantageous traits to their offspring.

Explanation:

8 0

3 years ago

Which one of the following statements best describes a solution with a pH of 3?

zalisa [80]

Statement D is the correct option as the solution will have pH of 3. It has an H3O+ ion concentration of 1 × $10^{-3}$ mol/L and is acidic.

Explanation:

It is given in question that solution must have pH of 3. The value if being less than 7 shows that solution is acidic. The pH value of 3 indicates that given solution is highly acidic and has strong acid. Strong acid gets fully dissociated into $H_{3}$ $O^{+}$ ions.

pH of the solution is calculated as:

pH = -log10[ $H_{3}$ $O^{+}$ ]

the concentration or molarity of the hydronium ion is given as moles/litre

concentration of hydronium ion in the solution is 1 X $10^{-3}$ moles/litre

putting the values in the equation:

pH = - log10( 1 X $10^{-3}$ )

pH = 3 (acidic)

Thus it can be concluded that D option is the right answer.

6 0

3 years ago

The pressure exerted by a gas on its container is inversely related to its Kelvin temperature

Lelu [443]

False, as pressure increases, temperature increases, given that other factors stay the same.

7 0

3 years ago

Determine the volume of distilled water that should be added to 20.0 mL of 12.0 M HCl(aq) in order to prepare a 0.500 M HCl(aq)

BARSIC [14]

Answer:

$V_{H_2O}=460 mL$

Explanation:

Hello!

In this case, in a dilution process, water is added to a solute in order to decrease its concentration but increase the volume of the solution. It means that if we have 20.0 mL of a 12.0-M solution of HCl and we want a 0.500-M solution, we need to apply the following formula considering that the moles remain unchanged:

$M_1V_1=M_2V_2$

Thus, solving for the final volume is:

$V_2=\frac{M_1V_1}{M_2}$

So plugging in the values we obtain:

$V_2=\frac{12.0M*20.0mL}{0.500M}\\\\V_2=480 mL$

Now, since the initial volume of acid was 20.0 mL and the final volume is 480 mL, the added volume of distilled water is:

$V_{H_2O}=480-20=460 mL$

Best regards!

8 0

3 years ago

How many amino acids are there and what three general categories do they fall into (i do not mean chemical categories in this qu

julsineya [31]

Technically, there are an infinite number of possible amino acids, though we've found only 20 common ones that many organisms use and at least half a dozen obscure ones that specific organisms use. We focus only on the 20 common ones unless we're in a college level biochemistry course.

The three categories are nonpolar ones, polar ones, and charged ones. The nonpolar ones have non-polar side chains (no oxygens or nitrogens), the polar ones have polar side chains (most contain an OH group but no COOH group), the charged ones are either acidic or basic (has COOH group or a basic nitrogen).

6 0

3 years ago