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
Pachacha [2.7K]
3 years ago
13

Hydrogen 3 has a half life of 12.32 years a sample of h-3 weighing 3.02 grams is left for 15.0 years what will the final weight

of H-3 sample be?
Chemistry
2 answers:
yawa3891 [41]3 years ago
8 0

Answer:

The final mass of sample is 1.3 g.

Explanation:

Given data:

Half life of H-3 = 12.32 years

Amount left for 15.0 years = 3.02 g

Final amount = ?

Solution:

First all we will calculate the decay constant.

t₁/₂ = ln² /k

t₁/₂ =12.32 years

12.32 y =  ln² /k

k = ln²/12.32 y

k = 0.05626 y⁻¹

Now we will find the original amount:

ln (A°/A) = Kt

ln (3.02 g/ A) = 0.05626 y⁻¹ × 15.0 y

ln (3.02 g/ A) = 0.8439

3.02 g/ A = e⁰°⁸⁴³⁹

3.02 g/ A = 2.33

A = 3.02 g/ 2.33

A = 1.3 g

The final mass of sample is 1.3 g.

olga_2 [115]3 years ago
3 0

Answer:

The anwer is 1.30 in plato

Explanation:

You might be interested in
Help please!!!!!! ASAP
uysha [10]

Answer:

Have you tried googling it

5 0
3 years ago
Why cant you ice skate on a lake when it is not frozen​
HACTEHA [7]

Answer:

You can't ice skate on a liquid, when it is frozen it is a solid, when it's unfrozen it is a liquid

4 0
3 years ago
Please Need help asap
ruslelena [56]

Answer:

A

Explanation:

The number of protons and neutrons of an element is the same. the electrons are the only thing that can differ.  The atomic number equal the protons and neutrons.

4 0
3 years ago
Do biotic factors contain cells
Keith_Richards [23]
Yes, anything that lives. Cells have a nucleus, they are alive and can reproduce. (Not man made/abiotic)
7 0
3 years ago
The number of ions in 17.1 gm of aluminum sulphate Al2 (SO4)3 =….. [Molar mass of Al2 (SO4)3 = 342 gm]
katen-ka-za [31]

Answer:

1.51 X 10^23 ions

Explanation:

The number of ions in 17.1 gm of aluminum sulphate Al2 (SO4)3 =….. [Molar mass of Al2 (SO4)3 = 342 gm]

in one molecule of Al2(SO4)3 there are 5 ions 2 aluminum and 3 sulfate ions

in 2 molecules there are 2X5= 10 ions

in 10 molecules there are 10X5 = 50 ions

molar mass of Al2(SO4)3 = (2 X 26.98) +( 3 X 32.1) + (3 X 4 X 16.0 ) =342.gms = 17.1/342 =0.0500 moles

1  mole =6.02 X 10^23 molecules ( see Avogadros number)

0.0500 moles = 0.0500 X 6.02 X 10^23 molecules =

0.301 X 10^23 molecules = 3.01 X 10^22 molecules

We determined that each molecule of Al2(SO4)3 has 5 ions

so 3.01 X10^22 molecules have 5 X 3.01 X 10^22 ions =

15.05 X 10^22 ions = 1.51 X 10^23 ions

3 0
3 years ago
Other questions:
  • Most electricity is generated by
    8·1 answer
  • Please help, i need help! it’s for chemistry!
    11·1 answer
  • A 30.2 mL aliquot of a 30.0 wt% aqueous KOH solution is diluted to 1.20 L to produce a 0.173 M KOH solution. Calculate the densi
    6·1 answer
  • Spider monkeys live in a biome with many trees. They move around by swinging from tree to tree. Spider monkeys do not build a ne
    11·1 answer
  • I need help on question 1 and 2
    6·2 answers
  • Lone pair in molecule exert greater solid angle than bond pair. explain?
    10·1 answer
  • How many valance electron dose an atom of oxgen have? A 6 B 4 C 2 D 8​
    7·1 answer
  • Which statement correctly describes the conductivity of the specified material?
    12·1 answer
  • Plz help i will give 32 points is it weather or climate i need help asap and i will give brainly
    11·2 answers
  • Please, I need this now.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!