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1 year ago

My science exam is due tomorrow and I HAVE LIMITED TIME. can someone help me how to absorb anything you read and memorize it...

Chemistry

1 answer:

igor_vitrenko [27]1 year ago

7 0

Answer:

It won't let me type this for some reason but here it is.

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Calculate the number of molecules in 0.75 moles of CH₄. x 10²³ molecules

spin [16.1K]

Ans :4.5 * 10²³ molecules

Given:

Moles of CH4 = 0.75

To determine;

The number of molecules of CH4 in 0.75 moles

Explanation:

1 mole of CH4 contains Avogadro's number i.e. 6.023*10²³ molecules

Therefore, 0.75 moles would correspond to :

= 0.75 moles * 6.023*10²³ molecules/1 mole

= 4.5 * 10²³ molecules

7 0

2 years ago

A weak acid is titrated with 0.1236 M NaOH. From the titration curve you determine that the equivalence point occurs after exact

MrRa [10]

Answer: The volume of NaOH required at the half-equivalence point is 6.21 mL

Explanation:

The chemical equation for the reaction of a weak acid with NaOH follows:

$HA+ NaOH\rightarrow NaA+H_2O$

From the equation, we can say that NaOH and weak acid is present in a 1 : 1 ratio.

We are given:

Volume of NaOH required at equivalence point = 12.42 mL

The volume of NaOH required at half-equivalence point will be = $\frac{12.42mL}{2}=6.21mL$

Hence, the volume of NaOH required at the half-equivalence point is 6.21 mL

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2 years ago

What is the name of The compound?

Liono4ka [1.6K]

Answer:

But-2-ene is your answer i guess

5 0

3 years ago

How many moles are in 16.94g of water?

alexira [117]

16.94/18=.9411111

sig figs: 0.9411 mole of water

7 0

3 years ago

How to do Lewis structure for Al?

Gnoma [55]

Notes:-

Al has Z=15

electron configuration:-

[Ne]3s²3p³

Valency is 3

So 3 dots are included

4 0

2 years ago