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
lisabon 2012 [21]
3 years ago
12

5

Chemistry
1 answer:
ehidna [41]3 years ago
6 0

Answer:

c

Explanation:

Molar mass of Na=23g/mol

amount of mole(n)=3

mass=?

therefore,n=m/M

3mol=m/23g/mol

m=23g/mol ×3mol

m=69g.

You might be interested in
A smaple of 1cm cuvette gives an absorbance reading of 0.558. if they absorptivity for this sample is 15000l/(mol.cm), what is t
Mazyrski [523]
To solve this problem, we use Beer's Law: A= ε.l.c
A is the absorbance- 0,558
<span>ε is</span> the molar absorptivity- is <span>15000 </span><span><span>L⋅mol-1</span><span>cm-1</span></span>
<span>l is </span>the length of the cuvette- 1 cm
<span>c is</span> the molar concentration

Applying the formula,
0,558= 15000 x 1 x c
0,558/15000= c
c= <span>3.72×<span>10⁻⁵ </span> <span>mol⋅L<span>⁻¹</span></span></span>
<span />
3 0
3 years ago
What is a ecosystems​
Maslowich

Answer:

a community or group of living organisms that live in and interact with each other in a specific environment.

Explanation:

7 0
3 years ago
Read 2 more answers
How do cells use lipids and carbohydrates?
Nata [24]

Answer:

Animals tend to use carbohydrates primarily for short-term energy storage, while lipids are used more for long-term energy storage. Carbohydrates are stored as glycogen in animals while lipids are stored as fats (in plants carbohydrates are stored as cellulose and lipids as oils)

Explanation:

hope this helps!

8 0
3 years ago
Read 2 more answers
What would happen to a diver who does no exhale while surfacing from a 30 m dive?
sertanlavr [38]
Their lungs would try to expand to about 4 timed the normal volume which would force air into the various body tissues. this can cause a lung expansion injury and it could case air embolism. Air embolism is when air bubbles get trapped in blood vessels. This can lead to a blockage which will could be fatal.
6 0
4 years ago
What are the evidence of continental drift
Veronika [31]
Widespread distribution of Permo-Carboniferous glacial sediments in South America, Africa, Madagascar, Arabia, India, Antarctica and Australia was one of the major pieces of evidence for the theory of continental drift.
5 0
3 years ago
Read 2 more answers
Other questions:
  • A chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calculate the empirical
    13·1 answer
  • Which of the following equations is balanced?
    8·2 answers
  • In the balanced reaction below, what is the mole ratio comparing iron (Fe) and oxygen gas (O2)?
    10·2 answers
  • The relationship between pressure and temperature of a gas, when volume and moles of a gas are held constant, is: P*T = k.
    14·1 answer
  • Need help what is the answer
    10·1 answer
  • What are three ways that we can identify when a chemical reaction is occurring?
    6·1 answer
  • What involves a metal and nonmetal ionic or covalent bond
    7·1 answer
  • Help me, no links, no i don't knows. reading science sheet
    5·2 answers
  • SEP math! Each day, the average person's
    8·1 answer
  • What do carbon, hydrogen, and oxygen atoms have in common?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!