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2 years ago

Any integrated chem buffs out there?

Chemistry

1 answer:

marusya05 [52]2 years ago

5 0

The field of study that Christian Doppler's work influenced the most was about <u>light </u><u>waves.</u>

Hope it helps you.

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During a reaction, the enthalpy of formation of an intermediate is -286

Darina [25.2K]

Answer:

O A. -572 kJ

Explanation:

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2 years ago

Find the pH. What are the pH values for the following solutions? (a) 0.1 M HCl (b) 0.1 M NaOH (c) 0.05 M HCl (d) 0.05 M NaOH

slega [8]

Answer:

(a) $pH=1$

(b) $pH=1.3$

(d) $pH=12.7$

Explanation:

Hello,

In this case, we define the pH in terms of the concentration of hydronium ions as:

$pH=-log([H^+])$

Which is directly computed for the strong hydrochloric acid (consider a complete dissociation which means the concentration of hydronium equals the concentration of acid) in (a) and (c) as shown below:

(a)

$[H^+]=[HCl]=0.1M$

$pH=-log(0.1)=1$

(b)

$[H^+]=[HCl]=0.05M$

$pH=-log(0.05)=1.3$

Nevertheless, for the strong sodium hydroxide, we don't directly compute the pH but the pOH since the concentration of base equals the concentration hydroxyl in the solution:

$[OH^-]=[NaOH]$

$pOH=-log([OH^-])$

$pH=14-pOH$

Thus, we have:

(b)

$pOH=-log(0.1)=1\\pH=14-1=13$

(d)

$pOH=-log(0.05)=1.3\\pH=14-1.3=12.7$

Best regards.

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3 years ago

a) What is distilled water? What are some examples of purified water? How does water purification by distillation and reverse os

TiliK225 [7]

Answer:

its c.

Explanation:

yesirrrr jsjsnndjf. xinsjsndk

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2 years ago

If all protons have positive charges how can an atomic nucleus be stable

Natalka [10]

We are covering the periodic table now in science. if I had to make a quick guess it would be that neurons are neutral so they Balance out the protons. it is just a guess so just warning. I hope this helped you in some way

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2 years ago

Elaborate the reason that the heat of vaporization of water is so much greater than its heat of fusion. A) The potential energy

Olenka [21]

I believe the answer is B. Liquid water is stabilized by strong inter-molecular forces between the molecules. This is why the energy needed to completely separate the molecules converting to gas is much greater than that of converting a solid into liquid. The latent heat of vaporization will have to be higher for the liquid to become a gas.

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2 years ago