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
sweet [91]
3 years ago
12

Carbon -11 is a radioactive isotope of carbon. It’s half life is 20 minutes. What amount of the initial mass of 70.0g of C -11 a

toms in a sample will be left after 80 minutes
Chemistry
1 answer:
dusya [7]3 years ago
6 0

Answer:

4.38g

Explanation:

70.0/2 = 35g - 20 mins

35/2 = 17.5g - 40 mins

17.5/2 = 8.75g - 60 mins

8.75/2 = 4.375g - 80 mins

You might be interested in
true or false? 2.0 moles of iron (Fe) would have the same number of atoms as 2.0 moles ph hydrogen (H).
Veronika [31]

Answer:

Explanation:

false

5 0
3 years ago
Inquiry Extension Consider a reaction that occurs between solid potassium and chlorine gas. If you start with an initial mass of
djyliett [7]

Answer:

5 this is the answer call me brainy please

5 0
3 years ago
What Happens When extra Solute is added to unsaturated ,saturated and supersaturated solution​
Ymorist [56]

of water is 36.0 g. If any more NaCl is added past that point, it will not dissolve because the solution is saturated. If more solute is added and it does not dissolve, then the original solution was saturated. If the added solute dissolves, then the original solution was unsaturated.

8 0
2 years ago
Calculate the molarity of a KCl solution if 37.3 g of KCl are dissolved in water to give a
saw5 [17]

Answer:

1M

Explanation:

find concentration in g/cm^3,then molar mass of kcl(39+35.5),if 1mol=74.5g what about 74.6

8 0
3 years ago
How many moles in 44.7 kg of carbon dioxide
slava [35]

Answer:

What is the number of moles of carbon present in 44 grams of carbon dioxide? One. 44 grams is a mole of carbon dioxide and there is one carbon atom in CO 2 so there is one mole of carbon. That’s how chemistry works.

Explanation:

What is the number of moles of carbon present in 44 grams of carbon dioxide? One. 44 grams is a mole of carbon dioxide and there is one carbon atom in CO 2 so there is one mole of carbon. That’s how chemistry works.

7 0
2 years ago
Other questions:
  • How many electrons are lost from oxygen? CO2 + H2 —> CO + H2O
    13·2 answers
  • If heat is released from water, what phase change occurs?
    11·2 answers
  • Why does it take so long time to develop a new variety of tomato
    9·1 answer
  • Will give Brainliest to the best answer! Please help ASAP!
    13·1 answer
  • The following characteristics describe which of these terms? The substance is mixed uniformly throughout and each part of the su
    8·2 answers
  • What is a substance formed when two or more elements combine and lose their distinct properties
    11·1 answer
  • Suppose a star is undergoing a nuclear reaction. What happens to the elements around the star as it begins to emit more and more
    6·2 answers
  • Calculate the molarity of the following solution: 0.50 moles of MgCl2 in 150 milliliters of solution.
    6·1 answer
  • Which part of a plant is responsible for carrying out photosynthesis
    9·2 answers
  • The smooth endoplasmic reticulum is associated with the production of <br> ___
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!