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3 years ago

5

If a solution has a concentration of 3.2x10-3 [OH-] what is the pOH of the solution?

1 answer:

nasty-shy [4]3 years ago

6 0

Answer:

The solution with [OH-] = 3.2x10-3 M will have an [H+] of 3.09x10–12 M.Explanation:

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Which societal problem can be solved, in part, by scientists identifying areas of high biodiversity?

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I thinks it's C although I'm not 100% positive.

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3 years ago

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If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the

Alchen [17]

In the first law of thermodynamics, it states when heat is converted into energy, where as the total energy in the room could transform into another but can never be created or destroyed. If you release 258J of energy in the room, 258J would also be removed from the food according to the isolating system.

Your answer would be 258J.

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3 years ago

The volume of a gas held at constant temperature varies indirectly as the pressure of the gas. If the volume of a gas is 1200 cu

kvasek [131]

Answer:

Volume of the gas at 500 mm Hg pressure is 960 $cm^{3}$

Explanation:

Let's assume the gas behaves ideally.

According to combined gas law for an ideal gas-

$\frac{P_{1}V_{1}}{T_{1}}=\frac{P_{2}V_{2}}{T_{2}}$

Where $P_{1}$ and $P_{2}$ are initial and final pressure of the gas respectively. $V_{1}$ and $V_{2}$ are initial and final volume of the gas respectively. $T_{1}$ and $T_{2}$ are initial and final temperature of the gas in kelvin respectively.

Here $T_{1}$ = $T_{2}$ , $V_{1}$ = 1200 $cm^{3}$ , $P_{1}$ = 400 mm Hg, $P_{2}$ = 500 mm Hg

So, $V_{2}=\frac{P_{1}V_{1}T_{2}}{T_{1}P_{2}}$

Hence $V_{2}=\frac{400\times 1200}{500}[tex]cm^{3}$ =960 $cm^{3}$ [/tex]

Hence volume of the gas at 500 mm Hg pressure is 960 $cm^{3}$

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4 years ago

Each chemical element is made up of only one kind of what

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Each chemical element is made up of one kind of atom, so the answer is A

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3. Which of the following could be characterized as macronutrients in food?

Neporo4naja [7]

Answer:

All of these are micronutrients.

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3 years ago