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
Sati [7]
3 years ago
12

Calcium has a cubic closest packed structure (fcc) as a solid. Assuming that calcium has an atomic radius of 197 pm, calculate t

he density of solid calcium. (1 pm = 10-12 m, 100 cm = 1 m)
Chemistry
1 answer:
Paha777 [63]3 years ago
5 0

Answer:

1.536 g/cm^3 is the density of solid calcium.

Explanation:

Formula used :  

\rho=\frac{Z\times M}{N_{A}\times a^{3}}

where,

\rho = density

Z = number of atom in unit cell

M = atomic mass

(N_{A}) = Avogadro's number  

a = edge length of unit cell

We have:

r = 197 pm = 197\times 10^{-12} m = 197\times 10^{-12}\times 100 cm

r=197\times 10^{-10} m

a=r\times 2\sqrt{2}

a=197\times 10^{-10} m\times 2\sqrt{2}=557.200\times 10^{-10} cm

M = 40 g/mol

Z = 4

On substituting all the given values , we will get the value of 'a'.

\rho =\frac{4\times 40 g/mol}{6.022\times 10^{23} mol^{-1}\times (557.200\times 10^{-10} cm)^{3}}

\rho =1.536 g/cm^3

1.536 g/cm^3 is the density of solid calcium.

You might be interested in
What is the predominant intermolecular force in the liquid state of each of these compounds: ammonia (NH3), methane (CH4), and n
MAVERICK [17]

Answer:

The  predominant intermolecular force in the liquid state of each of these compounds:

ammonia (NH3)

methane (CH4)

and nitrogen trifluoride (NF3)

Explanation:

The types of intermolecular forces:

1.Hydrogen bonding: It is a weak electrostatic force of attraction that exists between the hydrogen atom and a highly electronegative atom like N,O,F.

2.Dipole-dipole interactions: They exist between the oppositely charged dipoles in a polar covalent molecule.

3. London dispersion forces exist between all the atoms and molecules.

NH3 ammonia consists of intermolecular H-bonding.

Methane has London dispersion forces.

Because both carbon and hydrogen has almost similar electronegativity values.

NF3 has dipole-dipole interactions due to the electronegativity variations between nitrogen and fluorine.

3 0
3 years ago
2. Water is an example of a(n)
Alexus [3.1K]

it would be A ,inorganic Compound

6 0
3 years ago
PLEASE HELP ME!!! It would be great
kompoz [17]
The answer should be 0.5 because 6/12 is 0.5. It gives u the key equation
3 0
3 years ago
Substances that have a define size and shape and vibrating particles that are close together are​
Mazyrski [523]

Substances that have a define size and shape and vibrating particles that are close together are called Solid.

Explanation:

There are three states of matter - solid, liquid and gas.

Lets talk about solid state in detail.

In solid particles are closely packed and so they have very less or no space to move which results in vibrating particles. This results in solid substances having a fixed shape and volume.

The particles have very little space in between them, so it is not easy to compress solid.

There is no free space for particles to slide over each other, which does not allow solids to flow.

Also, particles in solid have a regular arrangement, they are not randomly packed.

7 0
3 years ago
Rays used to take pictures of bones in the human body are:
Alexeev081 [22]

Answer:

B

Explanation:

Because when you go to the doctors they say, "You need to get your x-rays done" not microwave

5 0
3 years ago
Other questions:
  • Why is salt put on icy roads and sidewalks in the winter?
    14·1 answer
  • If a substance reacts with oxygen, the chemical reaction is most likely a combustion reaction. decomposition reaction. single re
    15·1 answer
  • Which symbol represents an atom in the ground state with the most stable valence electron configuration?
    6·1 answer
  • two atoms respectively have Z=12, A=26 and Z=14, A=26. Can these two atoms be classified as isotopes of the same element?
    8·1 answer
  • What is a hypothesis?
    7·1 answer
  • What is the most common acid and base?<br>and why?
    7·1 answer
  • Heat 22.6 g of titanium from 1420oC to 1590oC
    8·1 answer
  • Jennifer is applying a constant force to swing a can on the end of a string, as shown here. If the can is moving around the circ
    10·2 answers
  • If a suspension of standing water where is zero gravity would it separate​
    14·1 answer
  • 02.04 Slide #2 Fill in the blanks based on the videos T Speed of reaction. When the of the reactants are moving too in a chemica
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!