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
aleksklad [387]
3 years ago
15

S, selentum 83 has a half life

Chemistry
1 answer:
Sphinxa [80]3 years ago
4 0
The answer is 75 minutes.
You might be interested in
scientist has discovered a new molecular compound that is a long chain of 26 carbons bonded together, with a methyl group on one
Lelechka [254]

Answer:

Fatty acid  

Explanation:

A fatty acid is a carboxylic acid with a long chain of 12 or more carbons.

If the molecule has no other distinguishing features, the compound is hexacosanoic acid, CH₃(CH₂)₂₄COOH.

8 0
4 years ago
How many molecules are in 5 moles of C10H210?
Pavlova-9 [17]

Answer:

3.0 x 10²⁴molecules

Explanation:

Given parameters:

Number of moles of compound  = 5moles

Unknown:

Number of molecules  = ?

Solution:

A mole is substance that contains the Avogadro's number of particles;

   1 mole  = 6.02 x 10²³ molecules

   5 moles of the compound will give 5 x 6.02 x 10²³ molecules

                = 3.0 x 10²⁴molecules

3 0
3 years ago
A 133.8-gram sample of bronze was 10.3% tin by mass. Determine the total mass of tin in the sample.
Kay [80]
You just need to multiply the total mass by the decimal value of the part that is tin. 133.8*0.103=13.8g (following the rules of significant figures).
6 0
4 years ago
Which two elements have similar physical and chemical properties?
guapka [62]

Explanation:

Elements in the same group have same number of valence electrons. And we know, the elements which have same number of valence electrons, have similar physical and chemical properties. Hence, the elements in the same group have similar physical and chemical properties.

5 0
3 years ago
Q1.
dlinn [17]

Answer:

there are four peaks in the 13c NMR (B)

3 0
3 years ago
Other questions:
  • A sample of aluminum foil contains 7.90 x 10^23 atoms. What is the mass of the foil?
    15·1 answer
  • A gas has a pressure of 50.0 mmHG at a temperature of 540 K. What will be the temperature if the pressure goes down to 3 mmHg?
    13·2 answers
  • The amount of heat needed to raise 25 g of a substance by 15°C is 293 J. What is the specific heat of the substance? Use the equ
    6·1 answer
  • What is formed from 2 pieces of different metals stuck together lengthwise?
    11·1 answer
  • What amount of heat is required to raise the temperature of 25 grams of copper to cause a 15ºC change? The specific heat of copp
    8·1 answer
  • How does molecular shape affect polarity?
    10·2 answers
  • Which would increase the amount of dissolved oxygen in a pond
    8·1 answer
  • GIVE REASON:A gas fills completely the container in which it is kept
    12·2 answers
  • Please help me I will mark you as BRAINLIST
    6·1 answer
  • Please help 12 points and ill mark<br> you brainiest .
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!