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
vladimir2022 [97]
3 years ago
10

You have a radioactive isotope with a mass of 400 grams. The sample has a half life of 5 days. How much is left after 25 days ha

ve passed?
Chemistry
1 answer:
Alexeev081 [22]3 years ago
4 0

Answer:

Amount left after 25 days = 12.5 g

Explanation:

Given data:

Mass of sample = 400 g

Half life of sample = 5 days

Mass left after 25 days = ?

Solution:

First of all we will calculate the number of half lives passes in given time period.

Number of half lives = Time elapsed / Half life

Number of half lives = 25 days/ 5 days

Number of half lives = 5

At time zero = 400 g

At 1st half life = 400 g/2 = 200 g

At 2nd half life = 200 g/2 = 100 g

At 3rd half life = 100 g/2 = 50 g

At 4th half life = 50 g/2 = 25 g

At 5th half life = 25 g/2 = 12.5 g

You might be interested in
Elements are identified by their atomic number because
o-na [289]
I think its Either B or C
7 0
4 years ago
What is one main role of state governments?
mr Goodwill [35]
C.commanding the army the the navy would be right I think
7 0
2 years ago
Read 2 more answers
All members of the alkene series of hydrocarbons have the general formula:
LenaWriter [7]

CnH2n since the equivalent unsaturation is equal with 1

7 0
3 years ago
Give all possible, accurate, correct IUPAC names for the following compounds:
Viefleur [7K]

Answer:

A. 4-ethyl-hex-3,5-dien-2-ol.

B. 2-chloro-3-methyl-5-<em>tert</em>-butylphenol.

Explanation:

Hello there!

In this case, according to the given problems, it is possible to apply the IUPAC rules to obtain the following names:

A. 4-ethyl-hex-3,5-dien-2-ol because we have an ethyl radical at the fourth carbon and the beginning of the parent chain is on the Me (CH3) because it is closest to first OH.

B. 2-chloro-3-methyl-5-<em>tert</em>-butylphenol: because we start at the alcohol and have a chlorine atom on the second carbon, a methyl radical on the third carbon, a <em>tert</em>-butyl on the fifth carbon and the parent chain is benzene which is phenol as an alcohol.

Regards!

6 0
3 years ago
Name four acids obtained from plants​
olga55 [171]

Answer:

Formic acid H. COOH

Acetic acid CH3.COOH

Propionic acid CH3 . CH1 . COOH

Butyric acid CH3 . CH1 . CH1 . COOH

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Explain why the molecules of a gas are never moving all at the same speed.
    14·1 answer
  • The particle that is identical to a high energy electron is known as a(n) _____. A. alpha particle B. beta particle C. gamma ray
    6·2 answers
  • The enzyme, carbonic anhydrase, is a large zinc-containing protein with a molar mass of 3.00 x10^4 g/mol. Zn is 0.218% by mass o
    15·1 answer
  • How does water relative densities as a solid and a liquid differ from that most other substance ?
    6·1 answer
  • Which of these is an example of naturally occuring electricity
    13·1 answer
  • What is a property of an acid
    8·1 answer
  • Refined, white table sugar is sucrose that has been "recrystallized." using methods you used in this experiment, describe how yo
    14·1 answer
  • Why do all the elements in Group 16 share similar properties?
    15·1 answer
  • The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a8 6. a) carbamate group b) carbonate
    15·1 answer
  • What happens at a constant temperature, as time progresses?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!