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irina1246 [14]
3 years ago
9

1 mole = 6.02 x 10^23 molecules. 1 mole= 22.4 L How many liters does 5.0 x 10^24 molecules occupy? .37 L 1.3 x10^49 L 190L or 6.

7 x 10^49

Chemistry
1 answer:
alexandr1967 [171]3 years ago
4 0

Answer:

185.92  L

Explanation:

Given data:

1 mole = 6.022× 10²³ molecules

1 mole = 22.4 L

Volume occupy by 5.0× 10²⁴ molecules

Solution:

1 mole = 6.022× 10²³ molecules

5.0× 10²⁴ molecules × 1 mole / 6.022× 10²³ molecules

0.83× 10¹ mol

8.3 moles

1 mole occupy 22.4 L

8.3 mol × 22.4 L / 1 mol

185.92  L

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Air in a closed cylinder is heated from 15°C to 36°C. If the initial pressure is 1000 torr, determine what is the final pressure
Bingel [31]

Answer:

1072 torr

Explanation:

To answer this problem we can use <em>Gay-Lussac's law</em>, which states:

  • P₁T₂=P₂T₁

Now we convert the given temperatures into K:

  • T₁ = 15°C ⇒ 15+273.16 = 288.16 K
  • T₂ = 36°C ⇒ 36+273.16 = 309.16 K

We <u>input the data</u>:

  • 1000 torr * 309.16 K = P₂ * 288.16 K

And <u>solve for P₂</u>:

  • P₂ = 1072 torr
7 0
3 years ago
How many hydrogen atoms in the following chemical formula ? <br> NH4OH
djyliett [7]

Answer:

5

Explanation:

NH4OH

The subscript gives the info that there are 4 hydrogen atoms but there is another H in the formula so you add them up.

5 0
3 years ago
Which observation most likely indicates that only a chemical change has taken place
salantis [7]

The correct answer as to which observation most likely indicates that only a chemical change has taken place would that the change cannot be reversed.

When it comes to changes in a system, it can either be:

  • physical change
  • chemical change

When a substance undergoes a physical change, the original version of the substance can be recovered. In other words, physical changes can be reversible.

When a substance undergoes a chemical change, the original version cannot be recovered because an entirely new product would have been formed. In other words, chemical changes are irreversible.

Thus, once a change becomes irreversible, such a change is said to be a chemical change.

More on chemical change can be found here: brainly.com/question/1161517

4 0
2 years ago
What is the oxidation number of NH4OH?
BlackZzzverrR [31]
NH4 itself is called ammonium ion with positive charge of 1+. hence the oxidation state will be +1

OH itself is called hydroxide ion with negative charge of 1-. hence the oxidation state will be -1

there's actually no such compound as stated in your chemical formula. although it's simply called ammonium hydroxide by looking at the chemical formula, in fact the compound should rightly be called as aqueous ammonia with chemical formula of NH3 (aq). this is because the ammonia molecule will ionise due to the presence of water molecule to be protonated, hence forming ammonium ion and hydroxide ion in the solution.
7 0
3 years ago
True or false? Salt water takes a shorter time to boil than regular water.<br><br> Send help!!!!
frozen [14]

Answer:

false

salt water does the oppsotie

Explanation:

3 0
3 years ago
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