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
Rus_ich [418]
3 years ago
12

If 2g of an isotope has a half life of 7days,the half life of 1g of sample will be?

Chemistry
1 answer:
Mariulka [41]3 years ago
6 0
7 days i think. but not sure about this answer.

You might be interested in
Explain how boiling and evaporating are alike and how they are differant
julsineya [31]

Answer:

The main difference between evaporation and boiling are : 1. Evaporation takes place at all temperatures, while boiling occurs at a particular temperature. 2. Evaporation takes place from the surface, whereas the entire liquid boils. 3. Evaporation can occur using the internal energy of the system, while boiling requires an external source of heat.

7 0
3 years ago
The molecular formula for caffeine is C8H10N4O2. Which of the following elements is not found in caffeine?
ANTONII [103]

The correct answer is:

b: Heluim

Explanation:

The caffeine contains: carbon , nitrogen , oxygen , hydrogen.

Caffeine is a primary nervous system energizer of the methylxanthine class. It is the world's most universally consumed psychoactive drug. Unlike many other psychoactive elements, it is fair and unlimited in nearly all parts of the world. Caffeine can be arranged as an alkaloid, a term used for substances originated as end results of nitrogen metabolism in some plants.

5 0
3 years ago
Read 2 more answers
Melting water is an example of a physical change because (3 points)
ladessa [460]
The water changes state.
3 0
3 years ago
The cylinder of aluminum in class was approximately 13mm in circumference and 42mm in length. What would be it's approximate mas
Roman55 [17]

Answer:

Mass, m = 1.51 grams

Explanation:

It is given that,

The circumference of Aluminium cylinder, C = 13 mm = 1.3 cm

Length of the cylinder, h = 4.2 cm

We know that the density of the Aluminium is 2.7 g/cm³

Circumference, C = 2πr

r=\dfrac{C}{2\pi}\\\\r=\dfrac{1.3}{2\pi}\\\\r=0.206\ cm

Density is equal to mass per unit volume.

d=\dfrac{m}{V}

m is mass of the cylinder

V is the volume of the cylinder

V=\pi r^2h\\\\V=\dfrac{22}{7}\times0.206^2\times 4.2\\\\V=0.5601\ cm^3

So,

m=d\times V\\\\m=2.7\times 0.5601\\\\m=1.51\ g

So, the mass of the cylinder is 1.51 grams.

5 0
3 years ago
hii what the procedures of making organic fertilizer and its precautions. can u answer it i kinda need it now
frez [133]

Answer:

Go through your kitchen waste. Vegetables and fruit peelings are the number one food remnants you should keep aside. ...

Add other organic materials to the compost. ...

Collect some garden waste. ...

Create the compost. ...

Apply the fertilizer.

3 0
2 years ago
Read 2 more answers
Other questions:
  • What is the mass of one mole of popcorn kernels? (sig fig hint: consider the precision of avogadro's number to determine the cor
    13·2 answers
  • 3.) How do atoms become positive ions?
    6·1 answer
  • How many significant digits are in 0.0038020 ?
    9·1 answer
  • How is a battery and a banana the same when considering energy?
    8·1 answer
  • How many atoms are in one mole of gold? A) 1.97 x 1023 atoms. B) 6.02 x 1023 atoms C) 79 atoms. D) 197 atoms
    14·2 answers
  • Who first determined the value of the avogadros number​
    7·1 answer
  • CORRECT ANSWER GETS BRAINLIEST! PLEASE HELP AND EXPLAIN!!
    5·1 answer
  • In the image below, does Group A or Group B have a stronger gravitational force between the objects in the group? Give one suppo
    8·2 answers
  • What is the name of a binary compound made up of selenium and potassium ?
    15·1 answer
  • Which particles change the<br> charge in atoms when ions are formed?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!