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
trasher [3.6K]
3 years ago
7

Help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!

Chemistry
1 answer:
Vsevolod [243]3 years ago
7 0
After the first 2 min the 20 g  are only 10g,  (1 half-life)
after other 2 more min 5g (2 half-lives)
after other 2 more min 2.5 g (3 half-lives)
after 2 more 1.25 g (4 haf lifes)



You might be interested in
Which statement best describes the properties of metals?
topjm [15]
<span>The only statement that states a fact about metals is the first option, letter A. They are shiny and bend without breaking. Choices B-D are wrong because metals are not insulators but are god conductors of heat and electricity. Metals can be flattened but they are not brittle.</span>
6 0
4 years ago
Read 2 more answers
Why are alphabets in the order they are?
sineoko [7]
Its arbitrary. It was developed on the greek phoenetic system and never reallybwas explained.
4 0
3 years ago
CULINARY ARTS
nexus9112 [7]
36 divided by 12 is 3. you need three times as much of the recipe to make 36 brownies. The answer is B
4 0
3 years ago
Read 2 more answers
Moles of Zn(NO3)2 in 131.50g of this substance.
Degger [83]
<span>number of moles= mass / molecular mass
mass=131.50g
molecular mass of Zn(NO3)2 =189.39 g/mol
number of moles = 131.50 g/189.39 g/mol =0.69433 mol</span>
3 0
4 years ago
Read 2 more answers
Do you think a single gene controls height in humans, as it does in peas? Explain your answer.
lakkis [162]
No, because humans are much more complex than peas.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the vapor pressure of water above a solution prepared by dissolving 28.5 g of glycerin (c3h8o3) in 135 g of water at 3
    14·1 answer
  • Which statement describes KCI(aq)?
    8·1 answer
  • Describe the path of an electron from a molecule of water to the sugar g3p
    9·1 answer
  • Free.... f..... r.... e.... e... FREE POINTS! (and brainliest ofc) Alright two more after this guys
    9·2 answers
  • Layered metamorphic rocks
    15·2 answers
  • Explain, in terms of molecular formulas and structural formulas, why cyclopropane is an
    5·1 answer
  • How many moles is 62 G of oxygen gas​
    11·1 answer
  • A + 2 B + 4 C → products is known to be second order in A, first order in B and independent of the concentration of C. What is t
    14·1 answer
  • How is the Periodic Table helpful to scientists?
    13·2 answers
  • Please answer it!! Would appreciate a lot!!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!