3 years ago

Question 14 of 25

Chemistry

1 answer:

Allisa [31]3 years ago

6 0

Answer:

it can be recycled over and over again

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What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?

gregori [183]

The ideal gas under STP is 22.4 L/mol. While the gas has a rule of P1V1/T1=P2V2/T2. So the volume under 101 kPa and 273 K is 0.2*22.4=4.48 L.

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3 years ago

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A cell has lost the ability to release energy from glucose for the cell to use. In which of the following cell structures would

Irina-Kira [14]

Answer:

Explanation:

b? i think

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2 years ago

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Calculate the pH for the following weak acid. A solution of HCOOH has 0.12M HCOOH at equilibrium. The Ka for HCOOH is 1.8×10−4.

Shtirlitz [24]

Answer:

the pH of HCOOH solution is 2.33

Explanation:

The ionization equation for the given acid is written as:

$HCOOH\leftrightarrow H^++HCOO^-$

Let's say the initial concentration of the acid is c and the change in concentration x.

Then, equilibrium concentration of acid = (c-x)

and the equilibrium concentration for each of the product would be x

Equilibrium expression for the above equation would be:

$\Ka= \frac{[H^+][HCOO^-]}{[HCOOH]}$

$1.8*10^-^4=\frac{x^2}{c-x}$

From given info, equilibrium concentration of the acid is 0.12

So, (c-x) = 0.12

hence,

$1.8*10^-^4=\frac{x^2}{0.12}$

Let's solve this for x. Multiply both sides by 0.12

$2.16*10^-^5=x^2$

taking square root to both sides:

$x=0.00465$

Now, we have got the concentration of $[H^+] .$

$[H^+] = 0.00465 M$

We know that, $pH=-log[H^+]$

pH = -log(0.00465)

pH = 2.33

Hence, the pH of HCOOH solution is 2.33.

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2 years ago

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Ow well can you apply Charles’s law to this sample of gas that experiences changes in pressure and volume? Assume that pressure

Whitepunk [10]

I think it is A I believe

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3 years ago

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Which statement best describes how electrons till orbitals in the penodic table?

nordsb [41]

Answer:

Electrons fill orbitals in order of increasing orbital energy

Explanation:

Apex

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