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
Zanzabum
3 years ago
7

How many moles and atoms are there in 60 grams of Calcium? quick answer plz i m preparing for exams

Chemistry
1 answer:
Nesterboy [21]3 years ago
4 0

Answer:

the number of mol that 60 gram of calcium will have this 1.5 mol.

as number of mole is equal to

n=w/m which is

60/40 which is 1.5 mol

and that of the number of atoms it will have will be 60 over 40 times the algorithm constant 6.223 times 10 to the power 23 which will give 9.0 345 ×10²³

You might be interested in
a 160 milligram sample of a radioactive isotope decays to 10 kilograms in 12 years. what is the half life of this element
Shkiper50 [21]

Answer:

3 years

Explanation:

Given data:

Initial amount of sample = 160 Kg

Amount left after 12 years = 10 Kg

Half life = ?

Solution:

at time zero = 160 Kg

1st half life = 160/2 = 80 kg

2nd half life = 80/2 = 40 kg

3rd half life = 40 / 2 = 20 kg

4th half life = 20 / 2 = 10 kg

Half life:

HL = elapsed time / half life

12 years / 4 = 3 years

8 0
3 years ago
Using the diagram to answer the question.
Kay [80]
B is the answer. It is the steepest



7 0
3 years ago
how would you write equation to show how buffers H2CO3 and NaHCO3 behave when (a) HCl is added and (b) NaOH is added.
Vlad1618 [11]
<span>H2CO3 <---> H+ + HCO3-
NaHCO3 <---> Na+ + HCO3-

When acid is added in the buffer, the excess H+ of that acid reacts with HCO3- to form H2CO3, and due to this NaHCO3 dissociates into HCO3- to attain the equilibrium. and hence there is no net effect of H+ due to pH remain almost constant. when a base is added to the buffer, the OH- ion of base react eith H+ ion present in buffer, then to attain equilibrium of H+ ion, the H2CO3 dissociates to produce H+ ion, but now there is the excess of HCO3- due to which Na+ ion react with them to attain equilibrium of HCO3-. hence there is again no net change in H+ ion due to which pH remain constant.....</span>
8 0
3 years ago
By the mid-1870s, _____ and his Standard oil company had monopolized
Lisa [10]
A is the correct answer
8 0
2 years ago
Read 2 more answers
2. Where can the oldest be found in this section of the ocean floor? Drag and drop an arrow to indicate this location
ira [324]

Answer:

The ocean

Explanation:

bc its 99% explored:))

8 0
3 years ago
Read 2 more answers
Other questions:
  • The ratio of hydrogen atoms to sulfur atoms in sulfuric acid, H2SO4 is
    10·1 answer
  • Kyle is swinging at the playground. As he moves from the top of the swing to the bottom he will _____.
    9·1 answer
  • Please help!
    15·1 answer
  • Please help ASAP.
    14·1 answer
  • Sand is more likely than shale to preserve fossils. True False
    8·2 answers
  • In a certain city, electricity costs $ 0.18 per kW ⋅ h . What is the annual cost for electricity to power a lamppost for 5.00 h
    9·1 answer
  • What is science? (1 point) Experimentation that discovers laws about the world around you. A body of knowledge and a process of
    8·1 answer
  • Gases can be defined by the following statement:
    12·1 answer
  • In which of the following statements best describes the sun's
    10·2 answers
  • Plz help me
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!