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
Nonamiya [84]
2 years ago
14

How many moles are in 2.98x10^23 particles?

Chemistry
1 answer:
Novosadov [1.4K]2 years ago
3 0

Answer:

\boxed {\boxed {\sf 0.495 \ mol}}

Explanation:

We are given a number of particles and asked to convert to moles.

<h3>1. Convert Particles to Moles </h3>

1 mole of any substance contains the same number of particles (atoms, molecules, formula units) : 6.022 *10²³ or Avogadro's Number. For this question, the particles are not specified.

So, we know that 1 mole of this substance contains 6.022 *10²³ particles. Let's set up a ratio.

\frac { 1 \ mol }{6.022*10^{23 } \ particles}}

We are converting 2.98*10²³ particles to moles, so we multiply the ratio by that value.

2.98*10^{23} \ particles *\frac { 1 \ mol }{6.022*10^{23 } \ particles}}

The units of particles cancel.

2.98*10^{23}  *\frac { 1 \ mol }{6.022*10^{23 } }}

\frac { 2.98*10^{23}}{6.022*10^{23 } }}  \ mol

0.4948522086 \ mol

<h3>2. Round</h3>

The original measurement of particles (2.98*10²³) has 3 significant figures, so our answer must have the same.

For the number we found, 3 sig figs is the thousandth place.

The 8 in the ten-thousandth place (0.4948522086) tells us to round the 4 up to a 5 in the thousandth place.

0.495 \ mol

2.98*10²³ particles are equal to approximately <u>0.495 moles.</u>

You might be interested in
ithium metal reacts with water to give lithium hydroxide and hydrogen gas. if 75.5 mL of hydrogen gas is produce at STP, what is
Galina-37 [17]
The reaction equation may be written as:
2Li + 2H₂O → 2LiOH + H₂

A single mole of gas occupies 22,400 ml of gas at STP. Therefore, the moles of hydrogen gas are
75.5 / 22,400 = 0.0034 mol
According to the equation, the moles of lithium are twice that of hydrogen gas; thus,
0.0034 x 2 = 0.0068 mol

The mass of lithium is given by:
mass = moles x atomic mass
mass = 0.0068 x 6.9
mass = 0.047 grams
6 0
2 years ago
Read 2 more answers
The mass percent of oxygen in CaO is what
TEA [102]
Add the reltive atomic mass of Ca and O which are 40 and 16 respectively after addition we get molecular mass of CaO which is 40+16=56 now divide atomic mass of O by molecular mass of CaO and multiply it with 100 as show n 16/56 *100=28.57%
5 0
2 years ago
Gerry and his family have moved into a new home with a great backyard. In the yard, they plan to have a garden, a lawn, and a pa
Anestetic [448]
The base of the garden in the scale drawing is 30 centimeters. (because 10x3 equals to 30)
The height of the garden in the scale drawing is 12 centimeters. (because 4x3 equals to 12)
The length of the patio in the scale drawing is 24  centimeters. (because 8x3 equals to 24)
The width of the patio in the scale drawing is 12 centimeters. (because 4x3 equals to 12)
5 0
3 years ago
Read 2 more answers
Help me out please due tomorrow
skelet666 [1.2K]
I'm pretty sure number 48 is C. Hope this helped :)
6 0
2 years ago
Read 2 more answers
Which is radioactive decay
Liula [17]

Answer:

Explanation:all

7 0
2 years ago
Other questions:
  • Energy is transferred thru heat by each of the following methods EXCEPT?
    5·2 answers
  • What is the total number of valence electrons in a silicate ion sio32-?
    14·1 answer
  • Suppose an ionic solid with a cubic unit cell contains A (cations) and Z (anions). The A ions are in the body center position an
    12·1 answer
  • Write a balanced net ionic equation for each of the following aqueous metathesis reactions. Classify each reaction as a neutrali
    12·1 answer
  • Why are there multiple ways to represent molecules
    6·1 answer
  • In science, all ideas are not tested with evidence from the natural world.
    5·2 answers
  • Describe the skier function of the law of conservation of energy
    6·1 answer
  • Can a non-metal replace a metal in a single replacement reaction? If yes, is a non-metal always not able to replace a metal in a
    9·1 answer
  • Calculate the mass of 4.95 x 10^15 Ag atoms
    12·1 answer
  • What information does the percent composition of an atom in a molecule
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!