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
sladkih [1.3K]
3 years ago
14

How many molecules are present in 187 grams of XeF4

Chemistry
1 answer:
PtichkaEL [24]3 years ago
4 0

There are 5.43 x 10²³ present in  187 grams of XeF₄

<h3>Further explanation  </h3>

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

\tt n(mol)=\dfrac{mass(m)}{MW}

mass of XeF₄ = 187 g

mol XeF₄ (MW=207,2836 g/mol) :

\tt mol=\dfrac{187}{207,2836 g/mol}=0.902

Number of molecules :

\tt N=0.902\times 6.02\times 10^{23}\\\\N=5.43\times 10^{23}

You might be interested in
How does your pattern of breathing change when you exercise and then rest ?​
Paladinen [302]

Your pattern of breathing increases, making it faster than usual, when you're exercising because you're pushing your body to work harder and speeding up your heart rate making you tired.

When you're resting your breathing pattern should be steady and normal since you aren't doing anything that requires lots of body work or something that would make you out of breath.

Hope this helps,

Davinia.

7 0
3 years ago
Which two subatomic particles do you add together to determine the atomic mass or mass # of the atom?
raketka [301]

Answer:

Protons and Neutrons

Explanation:

The sum of number of protons and the number of neutrons is equal to the mass of an element. Mathematically, it can be given as :

M = P + N

Also, the atomic mass can be calculated by the sum of the element's isotopes as isotopes have slightly different mass numbers.

Hence, protons and neutrons add together to determine the atomic mass.

4 0
3 years ago
How much greater is the pressure at the deepest part of the ocean compared to that found at sea level?
Leno4ka [110]
The deepest part of the ocean is the Marianas Trench, where the water pressure is 1,000 times that of which is found at sea level.
6 0
3 years ago
Read 2 more answers
What is the major defining property of gasses?.
jonny [76]

Answer:

Gases have no definite shape or volume. They are fluid, allowing particles/molecules to move freely.

The behavior of a gas is that the volume changes directly with temperature. With a constant volume, the pressure will be directly proportional to the amount of gas.

Explanation:

These are some of the properties I can think of

5 0
2 years ago
Helllppppppppp....<br>don't guess !!!​
noname [10]

Answer:

it answer D because waste is flowing thru the air

7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the voltage of a cell with half-reactions Zn(s) = Zn2+ + 2e-
    12·1 answer
  • The men\'s world record (as of 2007) for swimming 1500 m in a long course pool is 14 min 34.56 s. At this rate, how many seconds
    5·1 answer
  • Physical properties are :
    10·1 answer
  • What’s the molar mass of Mg(NO3)2
    6·1 answer
  • SCIENCE QUESTION help?
    10·1 answer
  • Where and in what features is water found on Earth?
    5·1 answer
  • Define the following IN YOUR OWN HANDWRITING
    14·1 answer
  • The element antimony has two stable isotopes, antimony-121 with a mass of 120.90 amu and antimony-123 with a mass of 122.90 amu.
    15·1 answer
  • TRUE OR FALSE<br> The products are the molecules that are produced in a reaction.
    5·1 answer
  • Please help, so confused!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!