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
guapka [62]
3 years ago
10

A radioactive isotope of potassium (K) has a half-life of 20 minutes. If a 40.0 gram sample of this isotope is allowed to decay

for 80 minutes, how many grams of the radioactive isotope will remain?
Chemistry
2 answers:
anzhelika [568]3 years ago
8 0

Answer:

A

Explanation:

A

Ivahew [28]3 years ago
5 0

Answer: 2.5 grams

Explanation:

You might be interested in
Please help me please please :(
Annette [7]

Answer:

B. and A.

Explanation:

May I have the Brainlliest award?

3 0
3 years ago
What is a possible cause of a large percentage of error in an experiment where mgo is produced from the combustion of magnesium?
PilotLPTM [1.2K]

A possible cause of a large percentage of error in an experiment where MgO is produced from the combustion of magnesium would be not all of the Mg has completely reacted. <span>

I hope this helps and if you have any further questions, please don’t hesitate to ask again. </span>

4 0
3 years ago
Read 2 more answers
What type of weather will maryland expect in a day or so?
ycow [4]

Answer:

clouds???

Explanation:

8 0
3 years ago
What is an element considered a pure substance?
Alona [7]

A compound is a pure substance composed of two or more different atoms chemically bonded to one another. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.


8 0
3 years ago
What is the molarity of a solution in which 0.732 moles of hcl are dissolved in 0.975 liters of solution?
posledela
Molarity is moles divided by liters so do .732 divided by .975 liters.
6 0
3 years ago
Other questions:
  • 5/10
    7·2 answers
  • Which of these is an acid?
    9·1 answer
  • 1. Valcouroceras is a New York State index fossil. Which mountain-building event
    14·1 answer
  • In 1906, a 600 g diamond was found at the Premier Mine in South Africa- the world's largest uncut diamond. Suppose the diamond's
    13·1 answer
  • A solution is prepared by dissolving 50.4 gg sucrose (C12H22O11C12H22O11) in 0.332 kgkg of water. The final volume of the soluti
    15·1 answer
  • A gas is contained in a 5.0–liter container at a pressure of 100 kPa. What size container would be required to contain the gas a
    12·1 answer
  • Li Ming thinks that chlorophyll is a reactant of photosynthesis, but her classmate Julian disagrees. Who is correct, and why?
    9·2 answers
  • Which of the correctly provides the name of the element
    10·1 answer
  • In condensation reactions, the atoms th make up a water from what?
    11·1 answer
  • 4. The radius of a hydrogen atom is 37 pm (1pm 10"m). How many hydrogen atoms lined up side to side would it take to make 1.00 i
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!