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2 years ago

Part AWhat happens to the water molecules whenheat is added?

2 answers:

8 0

Molecules in a gas have lots of energy and spread out even more than molecules in a liquid. Warm water has more energy than cold water, which means that molecules in warm water move faster than molecules in cold water

Varvara68 [4.7K]2 years ago

4 0

Heat is essentially energy, so when you add heat to water molecules, they move around more.

Eventually, once enough heat is added, water molecules will be able to escape the Inter-Molecular Forces that hold them together and keep them as liquid. The molecules will be able to move around freely, and take on the form of steam.

If you need me to explain this in more depth, let me know.
-T.B.

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A chemical process dissolves 500 milligrams of iron oxide every 20 minutes. How long would it take this reaction to dissolve 2 l

stiv31 [10]

Answer:

36290 min = 604.8 hr.

Explanation:

Knowing that:

1 lbs = 453.59237 grams.

∴ 2 lbs = 907.18474 grams.

Using cross multiplication:

500 mg of iron oxide dissolved → 20 minutes.

907184.74 mg of iron oxide dissolved → ??? minutes.

∴ The time needed to dissolve 2 lbs of iron oxide = (907184.74 mg)(20 min)/(500 mg) = 36290 min = 604.8 hr.

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2 years ago

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3 years ago

For the cell constructed from the hydrogen electrode and metal-insoluble salt electrode, B) calculate the mean activity coeffici

Brut [27]

Question:

For the cell constructed from the hydrogen electrode and metal-insoluble salt electrode, B) calculate the mean activity coefficient for 0.124 b HCl solution if E=0.342 V at 298 K

Answer:

The mean activity coefficient for HCl solution is 0.78.

Explanation:

Activity coefficient is defined as the ratio of any chemical activity of any substance with its molar concentration. So in an electrochemical cell, we can write activity coefficient as γ. The equation for determining the mean activity coefficient is

$E=E_{0}-0.0514 \mathrm{V} \ln \gamma$

As we know that $E_{0}$ = 0.22 V and E = 0.342 V, the equation will become

$0.342 V+0.0514 V \ln (0.124)=0.22 V-0.0514 V \ln \gamma$

$0.342 V-0.222 V=-0.0514 V(\ln \gamma+\ln 0.124)$

$0.12 \mathrm{V}=-0.0514 \mathrm{V}(\ln \gamma+\ln 0.124)$

$\frac{0.12}{0.0514}=-\ln (0.124 \gamma)$

$-2.3346=\ln (0.124 \gamma)$

$e^{-2.3346}=0.124 \gamma$

$0.0968=0.124 \gamma$

$\gamma=\frac{0.0968}{0.124}=0.78$

So, the mean activity coefficient is 0.78.

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3 years ago

Match each term with its definition. 1) reaction coordinate

Andreyy89

1) reaction coordinate is : b.the plot of the reaction progress as a function of time
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2 years ago

1. What processes change sediments into a sedimentary rock?

Vanyuwa [196]

For sediments to become a sedimentary rock, it usually undergoes burial, compaction, and cementation. (Hope that helps)

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2 years ago

Part AWhat happens to the water molecules whenheat is added?​

Part AWhat happens to the water molecules whenheat is added?