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
Bingel [31]
3 years ago
8

Platinum crystallizes with the face-centered cubic unit cell. The radius of a platinum atom is 139 pm. Calculate the edge length

of the unit cell and the density of platinum in g>cm3.
Chemistry
1 answer:
horrorfan [7]3 years ago
3 0

Answer:

Length = 393pm, Density = 21.3 g/cm^3.

Explanation:

From the question above, we have the following parameters or data which is going to aid in solving the above Question.

=> The radius of a platinum atom = 139 pm.

Therefore, the length can be calculated by making use of the formula given below:

Length = 2 √( 2r) = 2 × √ (2 × 139 × 10^-12m ) = 393 × 10^-10 m = 393pm.

The density can be calculated by making use of the chemical formula given below:

Density = mass ÷ volume = (195.064/ 6.02 × 10^23) ÷ (3.93 × 10^-10/ 10^-2) = 21.3 g/cm^3.

You might be interested in
Which of the following is the poorest conductor electricity
mojhsa [17]

Answer:

Fluorine

Explanation:

It is a non-metal does not conduct electricity

5 0
3 years ago
How much electric energy does a 40 W light bulb use if it is left on for 12 hours?
OlgaM077 [116]
480 hrs of electricity
3 0
3 years ago
A sample of nitrogen gas, (N2), occupies 45.0 mL at 27.00∘C and 80.0 kPa. What will be the pressure if the gas is cooled to −73.
maxonik [38]

Answer:

The new pressure is 53.3 kPa

Explanation:

This problem can be solved by this law. when the volume remains constant, pressure changes directly proportional as the Aboslute T° is modified.

T° increase → Pressure increase

T° decrease → Pressure decrease

In this case, temperature was really decreased. So the pressure must be lower.

P₁ / T₁ = P₂ / T₂

80 kPa / 300K =  P₂/200K

(80 kPa / 300K) . 200 K = P₂ →  53.3 kPa

6 0
3 years ago
The force of gravity always pulls ____
damaskus [11]
Down...
and if you were wondering, the earth pushes back
6 0
3 years ago
Different microscopic organisms cause different
lozanna [386]

Answer/Explanation:

A theory has lots of scientific evidence to back it up. We know this to be true based on lots of different diseases and studies of their spread.

A hypothesis is more of a starting point - an educated guess based on limited evidence. It requires further testing before becoming a theory.

A law is something that can be generalized to lots of contexts, and is universal. Such as the law of thermodynamics.

5 0
3 years ago
Other questions:
  • I NEED ANSWER PLEEEAASSEE!!!
    14·2 answers
  • During a lab activity, students prepared two solutions separately at the same temperature. Later they mixed the solutions and th
    7·1 answer
  • What is the magnetic quantum number value for an element with n = 1?
    6·1 answer
  • Acid rain can be destructive to both the natural environment and human-made structures. The equation below shows a reaction that
    7·2 answers
  • A 45 gram piece of metal has a volume of 18cm3. What is the density of this metal?
    10·1 answer
  • How would the world be different if people were not aware of radioactive decay
    12·1 answer
  • What foods contain large amounts of sugars and starches?
    5·2 answers
  • What is the solvent in a sports drink that contains water, high fructose corn syrup, sodium chloride, and food coloring?
    8·1 answer
  • Dr. Simmons wants to make sure her scientific investigation is considered good. She knows that for an experiment to produce vali
    12·1 answer
  • The empirical formula for a hydrocarbon is found to be CH₂. In a separate experiment, the molar mass is determined to be approxi
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!