1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ANEK [815]
3 years ago
12

What is the number of molecules present in 1.12 dm^3 of nitrogen gas at STP​

Chemistry
1 answer:
Anuta_ua [19.1K]3 years ago
4 0

Answer:

\huge\boxed{\sf No.\ of\ molecules = 3 * 10\²\² \ molecules}

Explanation:

<u>Given Data:</u>

Volume = v = 1.12 dm³ = 1.12 L

Density of nitrogen at STP = D = 1.25 g / L

Molar mass = M = 14 * 2 = 28 g / mol

Avogadro's Number = \tt{N_{A}} = 6.023 * 10²³ mol⁻¹

<u>Required:</u>

No. of molecules = ?

<u>Formula:</u>

\tt{No. \ of \ molecules = \frac{Density * Volume}{Molar\ Mass} * N_{A}}

<u>Solution:</u>

No. of molecules = (1.25*1.12) / 28 * (6.023 * 10²³)

No. of molecules = ( 1.4 / 28 ) * 6.023 * 10²³

No. of molecules = 0.05 * 6.023 * 10²³

No. of molecules = 0.3 * 10²³

No. of molecules = 3 * 10²² molecules

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
You might be interested in
Can someone please help me, best answer gets BRAINLIEST
salantis [7]

Answer:

9839 is your answer mate .

Plz mark brainliest and follow me ❤❤❤❤

7 0
3 years ago
What is the [OH] if the pH is 4.7<br>A. 4.7<br>B. 5.0<br>C. 4.7 x 10 -10<br>D. 5.0 x 10 -10​
earnstyle [38]

Answer:

D.

Explanation:

14-4.7=9.3

10^-9.3 = 5. x 10^-10

- You have to know the formulas. Let me know if you need them explained.

- Hope that helps! Please let me know if you need further explanation.

8 0
3 years ago
Calculate the molar mass of a solute in a 1.30 L solution with of 0.50 M
Veronika [31]

Answer: 16 g/mol

Explanation: Molarity is Moles/Liters or Mol/L

(0.50 mol/L)(1.30L) = 0.65mol

(cancels out L)

Molar mass is g/mol so...

10.5g/0.65mol = 16.1 g/mol

Rounded to 2 sig figs is 16 g/mol

6 0
3 years ago
Write a hypothesis for how did the Hawaiian island chain form
rosijanka [135]
It may have formed from volcanoes, which would be your hypothesis, and then you'd have to explain how the variables caused this.
7 0
3 years ago
Read 2 more answers
When dry ice is exposed to the air, it changes to a vapor. This is an example
Darya [45]

Answer:

b) evaporation

Explanation:

hope this helps

5 0
3 years ago
Read 2 more answers
Other questions:
  • 10 atoms of aluminum reacts with 6 molecules of oxygen gas to produce aluminum oxide. 4 Al + 3 O2 ––&gt; 2 Al2O3 What is the exc
    15·1 answer
  • On the basis of electronegativity, which of these pairs of elements is most likely to form monatomic ions?
    15·2 answers
  • Carbon forms two oxides in which the weight of oxygen combines with 1 g of carbon
    10·1 answer
  • Weak acids and weak bases react with metals and have the ability to corrode metals.
    8·2 answers
  • Which of these is true about electrons? posses a positive electrical charge of one (+1) have a negative electrical charge of one
    6·1 answer
  • What would the chemical formula be of a compound that has Hydrogen and Carbon in it?
    5·2 answers
  • How do I solve this ?
    14·1 answer
  • Why are earthworms called as “friends of farmers”? Answer in no less than 4 sentences
    6·1 answer
  • Which evidence supports the claim that matter can bend light waves?
    7·2 answers
  • Equation Unbalanced : __AlCl3 + __F2 --&gt; __AlF3 + __Cl2
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!