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
dimaraw [331]
3 years ago
7

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Chemistry
2 answers:
Contact [7]3 years ago
8 0
After first half-life you will have 100/2=50g. After second half-life you will have 50/2=25g.
zubka84 [21]3 years ago
6 0
25 grams. 

A half life is the amount of time it takes for an isotope to decay half of itself. 

So after one half life, there will be half of the original amount. 

100/2=50

After another half life, there will be half of that amount. 

50/2 = 25
You might be interested in
A system gains 652 kJ of heat, resulting in a change in internal energy of the system equal to +241 kJ. How much work is done?
levacccp [35]

Answer:

-411 kj

Explanation:

We solve by using this formula

∆U = ∆Q + ∆W

This formula is the first law of thermodynamics

Change in internal energy U = +241

Heat gained by system Q = 652

Putting the value into the equation

+241 = 652 + W

Workdone = 241 - 652

Workdone = -411 kj

Since work done is negative it means that work was done by the system

3 0
2 years ago
If cells in the process of dividing are subjected to colchicine, a drug that interferes with the formation of the spindle appara
Orlov [11]

The question is incomplete as it does not have the options which are:

A) anaphase

B) prophase

C) telophase

D) metaphase

E) interphase

Answer:

The correct answer will be option-D

Explanation:

Colchicine is a drug obtained from the <em>Colchicum autumnale</em> which is a poisonous European flowering plant. The drug is used to treat joint swelling and gout.

Colchicine shows its effect during the cell division cycle especially during the division of nuclear content. When the cell is in metaphase and is preparing for the anaphase, the colchicine inhibits the polymerisation of the microtubules. The inhibition of microtubules inhibits the assembly of the mitotic spindle as a result of this the DNA do not move into new daughter cells.

Thus, option-D is the correct answer.

5 0
2 years ago
Chemistry is the study of all of the following EXCEPT
ValentinkaMS [17]
B - projectile motion
4 0
3 years ago
Density is the _____ of a certain ______
olga2289 [7]
I think the first blank is "solidity" and second is "object."
3 0
3 years ago
A tube of air contains a feather and a coin. both objects are dropped at the same time. the coin falls faster than the feather.
Mazyrski [523]
Because gravity treats all mass equally. It doesn't treat heavier objects with greater force. All objects experience the gravitational pull equally. Making the two different weights reach the ground together simultaneously despite their weight differences.
6 0
3 years ago
Other questions:
  • Abnormal behavior is defined as a?
    12·1 answer
  • Which doesn't belong in the group?
    5·1 answer
  • Will reward brainliest !!!
    5·2 answers
  • A projectile is fired with speed v0 at an angle theta from the horizontal from the horizontal as shown in the figure.
    13·1 answer
  • Car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?
    7·1 answer
  • Four grams of hydrogen react completely with 32 grams of oxygen. Based on the law of conservation of mass how many grams of wate
    11·1 answer
  • During photosynthesis, plants transform
    7·1 answer
  • Iron fluoride (FeF2) dissociates according to the following equation: FeF2(s) ⇌ Fe2+(aq) + 2 F–(aq) A sample of iron fluoride (F
    8·1 answer
  • Which metal will lose electrons more easily, Ca or Mg?
    5·1 answer
  • Name the following compound: CH₂-C- CH₂-CH₂-CH₂-C - H butanal O2-butanol O propyl hydrogen ether 1-propanone​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!