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
finlep [7]
3 years ago
9

A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is 19.78 nm. What is the total wi

dth of a crystal in millimeters 105 molecules across? Write your answer as a decimal.
Chemistry
1 answer:
kobusy [5.1K]3 years ago
6 0
1 nm = 0.000001 mm

105 * 19.78  * 0.000001 = 0.0020769 mm
You might be interested in
Salt water is best described as _______.
Readme [11.4K]

Answer:

Salt water is, A. a mixture

3 0
3 years ago
Read 2 more answers
What is a mole?
fredd [130]

Answer:

B.

Explanation:

One mole is the amount of substance that contain the Avogadro number which is equal to 6.022×10^23 atom, molecules or ions.

7 0
3 years ago
The activation energy of an endothermic reaction _____.
Anon25 [30]
Endothermic reactions are reactions that require heat in the course of the process. The heat of reaction in this case is positive which means the energy of the products is greater than the energy of the reactants. In this case, the answer to this problem would have to be <span>1. must be greater than the required ΔH </span>
3 0
3 years ago
Read 2 more answers
Leon uses a pressure gauge to measure the air pressure in one of his car tires. The gauge shows that the pressure is 220 kilopas
mamaluj [8]

Answer:

53.8 L

Explanation:

Ideal gas law

PV=nRT

must be for volume so we arrange to V=nRT/P

V= (4.8)(8.31)(297)/220

3 0
3 years ago
Read 2 more answers
Which of the following is included in the measure of U.S. GDP?
finlep [7]

the value of increase in business inventories.

7 0
4 years ago
Other questions:
  • Propane has a long standing reputation for being a ______<br>burning fuel
    9·1 answer
  • By what factor does [h+ ] change for each ph change? (a) 3.20 units
    15·1 answer
  • A preliminary untested explanation that tries to explain how or why things happen in the manner observed is a scientific
    6·2 answers
  • The number of _______ in an atom of an element is the element's atomic number
    13·1 answer
  • What structures are found in<br> plant cells that are not found in animal cells?
    5·1 answer
  • +30 points
    14·1 answer
  • Are these physical or chemical changes?
    8·2 answers
  • What would you predict to be the valence number and oxidation number of tin?
    15·1 answer
  • An isotope of an element has the following symbol: 131 I How many electrons does it
    11·1 answer
  • Please Help I need an explanation on how to do this
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!