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3 years ago

You have 286.7g of PbO. For lab, you need 2.50M PbO. How much PbO can you make? Don't forget your units.

Chemistry

1 answer:

blsea [12.9K]3 years ago

4 0

Answer:

0.514 L (liters)

Explanation:

I took the Quizziz, and hope this helps!

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Water and methane have similar molar masses. methane changes from liquid to a gas. what could account for the difference

TEA [102]

Water contains more electronegative oxygen. Hydrogens bonded directly to oxygen atoms gets partial positive charge which means the electron density on hydrogen atoms has decreased and a partial negative charge forms on oxygen atom. This partial negative charge on oxygen and partial positive charge on hydrogen attracts each other and forms intermolecular force called Hydrogen Bonding.

H₂O ------ H₂O ------- H₂O

The dashed line show hydrogen bonding.

In case methane hydrogen atoms are bonded to Carbon atoms and there is very small electronegativity difference between them, hence, fails to form partial positive and partial negative charge, hence, no hydrogen bonding. Such non polar compounds obtain special type of intermolecular interactions called London-Dispersion Forces which are weaker compared to Hydrogen bond interactions.

Result:
Water exist as liquid due to strong Hydrogen bonding between water molecules, while, methane lacks such interactions.

5 0

3 years ago

8. Zeolite is used to remove moisture from methane. A vertical column is filled with 1000.0 kg of dry zeolite. The zeolite has t

Natasha_Volkova [10]

Answer:

Follows are the solution to this question:

Explanation:

Methane inlet humidity content of $=7.00\%$

Methane moisture outlet content $=0.05\%$

Zeolite absorption humidity $= 6.95\%$

Dry zeolite 1 kg will accommodate water $= 0.1000 \ kg$

One kilogram of Dry Zeolite will carry water from $=0.1000\ kg$

The water can contain 1000 kg of zeolite $= 100 \ kg$

Methane which would be made $=\frac{100}{6.95\%}= 1,439 \ kg$

That's why it will be producing 1439 kg of methane.

3 0

3 years ago

Which arrow or arrows represent reactions that demonstrate a conservation of mass and energy? Explain your answer.

liberstina [14]

Answer:

Explanation:

I would say A because the sun makes energy right so if you are looking for an arrow or arrows I would say A I hope this helps!! and have a great day or night

8 0

3 years ago

Read 2 more answers

Describe how you could show that a compound is an acid

Charra [1.4K]

An acid is a substance that donates hydrogen ions. Because of this, when an acid is dissolved in water, the balance between hydrogen ions and hydroxide ions is shifted. Now there are more hydrogen ions than hydroxide ions in the solution. This kind of solution is acidic.

5 0

3 years ago

The successive ionization energies for a given element are listed. How many valence electrons does it have?

damaskus [11]

Answer:

3 valence electrons

Explanation:

Let us first find the amount increased for everything.

From 1st to 2nd, 1048 - 620 = 428

428 increased from 1st to 2nd.

From 2nd to 3d, 2144 - 1048 = 1096

1096 increased from 2nd to 3rd.

From 3rd to 4th, 8724 - 2144 = 6580

6580 increased from 3rd to 4th.

From 4th to 5th, 10141 - 8724 = 1417

From 3rd to 4th, it increased the most. Therefore, we assume that those are the beginning core electrons and not valence electrons. Also, starting from 3rd, they are all core electrons.

For the 1st and 2nd, we can assume they are valence electrons because the kJ/mol didn't increase that much.

Since the core electrons started from the 3rd, we most likely have 3 valence electrons.

So the final answer is 3.

Hope it helped!

5 0

3 years ago