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
svp [43]
2 years ago
10

a radioactive sample contains 3.00 g of pure 11c, which has a half-life of 20.4 min. (a) how many moles of 11c are present initi

ally?
Mathematics
1 answer:
sveta [45]2 years ago
8 0

The number of mole of pure 11C (carbon-11) initially present is 0.2727 mole

<h3>Description of mole </h3>

The mole of a substance is related to it's mass and molar mass according to the following equation

Mole = mass / molar mass

With the above formula, we can obtain the number of mole of pure 11C. Detail below:

<h3>How to determine the mole of 11C</h3>

From the question given, the following data were obtained:

  • Molar mass of 11C = 11 g/mol
  • Mass of 11C = 3 g
  • Mole of 11C =?

Mole = mass / molar mass

Mole = 3 / 11

Mole = 0.2727 mole

Therefore, the number of mole of pure 11C initially present is 0.2727 mole

Learn more about mole:

brainly.com/question/13314627

#SPJ4

You might be interested in
If a basketball is bounced at a angle of 30 degrees, it will bounce off the court at and angle of
Serjik [45]

Answer:

I think it's 30

Step-by-step explanation:

I took it as reflection of light..or ig it has same idea

6 0
3 years ago
Percentage change 42 increased to 145
dedylja [7]
The answer should be 103? because when you add 103 to 42 u should get 103%.
3 0
3 years ago
What is 9+m=1.5<br><br><br>i need the answer for m
Oksi-84 [34.3K]

Answer:

m = - 7.5

Step-by-step explanation:

Given

9 + m = 1.5 ( subtract 9 from both sides )

m = - 7.5

5 0
3 years ago
Write each percent as a fraction and as a decimal
slavikrds [6]
1% as a fraction is 1/100
1% as a decimal is 0.01

3 0
3 years ago
Write an expression that represents n plus 7 multiplied by 3.
diamong [38]
The <span>expression that represents n plus 7 multiplied by 3 is
(n + 7)(3)
The entire expression, (n + 7) is multiplied by 3 since it would be inconvenient to state the expression as given above if what is meant was
(n + 7x3). It would have simply been n plus 21.</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • How many ways can 6 people sit on a bench if 3 of them have to sit side by side
    8·1 answer
  • The radius of a circle is (7n-21) inches find circumference of the circle in terms of n.
    13·1 answer
  • The average retirement age for a certain country was reported to be years according to an international group dedicated to promo
    13·1 answer
  • What is the area of 3 square root 5
    9·1 answer
  • 4{x + 8} +6 = 38 what is the value of x
    5·2 answers
  • A Parachutes speed during a freefall reaches 108 mph. What is the speed in feet per second? At this speed, how many feet with a
    5·1 answer
  • 3/9 and 5/15 are they equivalent
    8·1 answer
  • CAN someone pls help me!!!
    8·1 answer
  • The value of a fifth stock, stock E, changed by 2 1/2 times as much as Stock D. What is the change in value in Stock E?
    9·1 answer
  • Convert 3.5 into fraction​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!