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3 years ago

Why does a plastic bottle that is sealed at a high altitude change its shape when it is taken to a low altitude?

Chemistry

2 answers:

timama [110]3 years ago

3 0

The number of gas molecules that strike the outside of the bottle increases as altitude decreases.

Airida [17]3 years ago

3 0

Explanation: This happens due to the change in the atmospheric pressure around the plastic bottle.

When air is filled in the bottle at higher altitude, the concentration of air molecules is low.

When the same bottle is brought at low altitudes where the concentration of gas molecules outside the bottle is higher than inside the bottle, so the pressure exerted by the higher number of molecules present outside will push the lower number of the gas molecules. Hence, resulting the bottle to shrink.

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What actions can you take to reduce your impact on the environment?

CaHeK987 [17]

Answer:

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3 years ago

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The coefficient of performance (cop) of a refrigerator is defined as the ratio of?

Vinvika [58]

The coefficient of performance (cop) of a refrigerator is defined as the ratio of " the work necessary to heat or cool something usefully."

The usable heating or cooling delivered to work required ratio, also known as the coefficient of performance, or COP, of a heat pump, refrigerator, as well as air conditioning system. Higher efficiency, less energy (power) usage, and thus reduced operational costs are all related to higher COPs.

Coefficient of performance formula:

$K = Q_{H} / W_{in}$

where, K = Coefficient of performance, $Q_{H}$ = heat of pumps output, $W_{in}$ = work required by the system.

It is refrigeration's coefficient of performance (COP) will always be greater than 1.

Therefore, the coefficient of performance (cop) of a refrigerator is defined as the ratio of " the work necessary to heat or cool something usefully."

To know more about coefficient of performance

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2 years ago

Calculate either [ H 3 O + ] or [ OH − ] for each of the solutions.

STALIN [3.7K]

Answer: Solution A : $[H_3O^+]=0.300\times 10^{-7}M$

Solution B : $[OH^-]=0.107\times 10^{-5}M$

Solution C : $[OH^-]=0.177\times 10^{-10}M$

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxide ion concentration.

$pH=-\log[H_3O^+]$

$pOH=-log[OH^-}$

$pH+pOH=14$

$[H_3O^+][OH^-]=10^{-14}$

a. Solution A: $[OH^-]=3.33\times 10^{-7}M$

$[H_3O^+]=\frac{10^{-14}}{3.33\times 10^{-7}}=0.300\times 10^{-7}M$

b. Solution B : $[H_3O^+]=9.33\times 10^{-9}M$

$[OH^-]=\frac{10^{-14}}{9.33\times 10^{-9}}=0.107\times 10^{-5}M$

c. Solution C : $[H_3O^+]=5.65\times 10^{-4}M$

$[OH^-]=\frac{10^{-14}}{5.65\times 10^{-4}}=0.177\times 10^{-10}M$

7 0

3 years ago

Standard atmospheric pressure corresponds to the normal air pressure at sea level.

jekas [21]

Im not really sure what your asking.... Standard sea-level pressure, by definition, equals 760 mm (29.92 inches) of mercury, 14.70 pounds per square inch, 1,013.25 × 10 3 dynes per square centimetre, 1,013.25 millibars, one standard atmosphere, or 101.325 kilopascals.

""atmospheric pressure | Britannica.com""

6 0

3 years ago

NEED HELP ASAP PLEASE

frutty [35]

C. NO2 is covalent. Hope this helps!

6 0

3 years ago

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