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melomori [17]
4 years ago
5

Much to everyone’s surprise, nitrogen monoxide (NO) has been found to act as a neurotransmitter. To prepare to study its effect,

a sample was collected in a container of volume 300.0 cm3. At 14.5 °C its pressure is found to be 34.5 kPa. What amount (in moles) of NO has been collected?

Chemistry
1 answer:
SVEN [57.7K]4 years ago
3 0

Answer: 0.0043mole

Explanation:Please see attachment for explanation

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What is the OH- of {H+} = 4.0 x 10 to the power of -8
True [87]

Answer:

At standard room temperature, [{\rm OH^{-}] \approx 2.5 \times 10^{-7}\; \rm M when [{\rm H^{+}] = 4.0 \times 10^{-8}\; \rm M.

Explanation:

The following equilibrium goes on in water:

{\rm H_{2}O}\, (l) \rightleftharpoons {\rm H^{+}}\, (aq) + {\rm OH^{-}}\, (aq).

The forward reaction is known as the self-ionization of water. The ionization constant of water, K_{\rm w}, gives the equilibrium position of this reaction:

K_{\rm w} = [{\rm H^{+}] \cdot [{\rm OH^{-}}].

At standard room temperature (25\; {\rm ^{\circ}C}), K_{\rm w} \approx 10^{-14}. Also, [{\rm H^{+}}] = 4.0 \times 10^{-8}\; \rm mol \cdot L^{-1}. Substitute both values into the equation and solve for [{\rm OH^{-}}].

\begin{aligned} {[}{\rm OH^{-}}{]} &= \frac{K_{\rm w}}{[{\rm H^{+}}]} \\ &\approx \frac{10^{-14}}{4.0 \times 10^{-8}} = 2.5 \times 10^{-7}\end{aligned}.

In other words, in an aqueous solution at standard room temperature, [{\rm OH^{-}] \approx 2.5 \times 10^{-7}\; \rm M when [{\rm H^{+}] = 4.0 \times 10^{-8}\; \rm M.

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3 years ago
How would the concentration of silver ions compare in a 1.0 x 10-16 L saturated solution to a 1.5 x 10-16 L saturated solution?
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3 years ago
What is the pH of a solution with an OH- ion concentration of 4.01E-4?
Ber [7]

Answer:

[H]=10^-4 when ph=4 higher

[H]=10^-5 when ph =5 lower

Explanation:

brains

8 0
3 years ago
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