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
cestrela7 [59]
2 years ago
9

The half-life of a strontium isotope is 25 years. How much of this particular isotope will remain after 100 years if the startin

g mass is 16 grams?
Chemistry
1 answer:
Phoenix [80]2 years ago
3 0

Answer:

1 gram

Explanation:

Half life = 25 years

Starting mass = 16 grams

Time = 100 years

Number of half lives = Time / Duration of Half life = 100 / 25 = 4

After first Half life;

Remaining mass = 16 / 2 =  8 g

After Second Half life;

Remaining mass = 8 / 2 =  4 g

After Third Half life;

Remaining mass = 4 / 2 =  2 g

After Fourth Half life;

Remaining mass = 2 / 2 = 1 g

You might be interested in
WHAT CAUSES THE MOVEMENT OF THESE AIR PARTICLES IN SOUND WAVES?
SVETLANKA909090 [29]
A vibrating string can create longitudinal waves as depicted in the animation below.



The answer is C) vibrations
8 0
3 years ago
All BUT one factor contributes to natural selection. That factor is
Juli2301 [7.4K]
<span>the one that is not a factor that contribute to natural selection is : Population stability population refer to the capability of a community to maintain its total amount of organisms within a specific period of time. This has nothing to do with natural selection, which basically a nature's way to reduce the number of organism to findout which organisms are more adaptive</span>
7 0
3 years ago
Read 2 more answers
How many moles of glucose molecules?​
muminat

1 molecule of glucose contains 6 atoms of C, 12 atoms of H , and 6 atoms of 0.1 mole of glucose contains 6 moles of C atoms , 12 moles of H atoms , and 6 moles of O atoms .

6 0
3 years ago
If an ocean wave has a frequency of 2 hz and a speed of 4 m/s , what is the wavelength
Anastaziya [24]

Answer:

2 m

Explanation:

6 0
3 years ago
How many moles are there in 8.94*10^24 atoms P?
IgorC [24]

Answer:

<h2>14.85 moles </h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{8.94 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\   = 14.850498

We have the final answer as

<h3>14.85 moles</h3>

Hope this helps you

7 0
2 years ago
Read 2 more answers
Other questions:
  • The proton,neutron and electrons in the atom of the element represented by the symbol 231Y89 are:
    14·1 answer
  • If you combined neon argon and helium together what would you expect to happen
    15·1 answer
  • What is a molecular formula?
    15·1 answer
  • How is a mixture different from a compound? 1. Particles of a mixture are combined chem2. Components of a mixture can be sepa- r
    10·1 answer
  • Consider this equilibrium:
    5·1 answer
  • Why is the Earth's hydrosphere (oceans) made up of mostly hydrogen<br> and oxygen? *
    15·1 answer
  • Do you guys know any cool app for revision apart from quiz let
    14·1 answer
  • Oxygen has 8 positively charged protons what is the number of negatively charged electrons in an atom of oxygen?
    15·1 answer
  • Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of CH3Cl. a. The electron-pair geometry is lin
    15·1 answer
  • What is an element?<br>​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!