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
dem82 [27]
3 years ago
14

Which of the following best defines one mole of a substance?

Chemistry
1 answer:
Fantom [35]3 years ago
4 0

1 mole = 6.022x10²³ of anything.  The number 6.022x10²³ is known as Avogadro's number.  Avogadro's number is not a mass, it is just a unit of measure.  Other units of measure include: 1 pair (2), 1 dozen (12), a baker's dozen (13), et. al.  1 mole is similar in that it simply represents a certain number of things; specifically, Avogadro's number of things.

Since we know 1 mole is not a mass, the first two options can be eliminated.  On observing the third option, it cannot be correct because, as we said, 1 mole is equal to Avogadro's number—not an atom of a given substance.

<h3>Answer:</h3>

Amount of substance present in Avogadro's number of particles of the substance

You might be interested in
How does a metric prefix modify a unit?
Daniel [21]

Answer:Locate the row corresponding to known unit of torque along the left of the table. Multiply by the factor under the column for the desired units. For example, to convert 2 oz-in torque to n-m, locate oz-in row at table left. Locate 7.062 x 10-3 at intersection of desired n-m units column. Multiply 2 oz-in x (7.062 x 10-3 ) = 14.12 x 10-3 n-m.

Converting between units is easy if you have a set of equivalencies to work with. Suppose we wanted to convert an energy quantity of 2500 calories into watt-hours. What we would need to do is find a set of equivalent figures for those units. In our reference here, we see that 251.996 calories is physically equal to 0.293071 watt hour. To convert from calories into watt-hours, we must form a “unity fraction” with these physically equal figures (a fraction composed of different figures and different units, the numerator and denominator being physically equal to one another), placing the desired unit in the numerator and the initial unit in the denominator, and then multiply our initial value of calories by that fraction.

Explanation:

Since both terms of the “unity fraction” are physically equal to one another, the fraction as a whole has a physical value of 1, and so does not change the true value of any figure when multiplied by it. When units are canceled, however, there will be a change in units. For example, 2500 calories multiplied by the unity fraction of (0.293071 w-hr / 251.996 cal) = 2.9075 watt-hours.

7 0
3 years ago
PLEASE HELP ME QUICK
Mama L [17]

Answer:

b. decreases

C. neither a physical change nor a chemical change

light work

6 0
3 years ago
Which statement is NOT correct about the classification of amino acids?
nordsb [41]

Answer:

The correct answer is D.

Explanation:

Amino acids can be classified <u>depending on the side chain structure</u> in

  1. acidic
  2. basic
  3. neutral
  4. aliphatic
  5. aromatic
  6. sulfur containing amino acids.  

Aspargine is a <em>neutral amino acid</em> that has a key role in <u>glycoproteins biosynthesis.</u> Aspargine helps the body to resist fatigue and contributes to a smooth functioning of the liver.  

7 0
2 years ago
Name 2 types of conduction
Daniel [21]

Answer:

Electric Conduction. Electric conduction refers to the ability of a material to transfer an electric...

Heat Conduction. Where electric conduction refers to a transfer or electric current,

Explanation:

6 0
3 years ago
What makes up the human body? (A)many different gases (B)carbon dioxide (D)many cells (C) minerals
never [62]

Answer:

<em></em>(B) Carbon Dioxide<em></em>

Explanation:

Roughly 96 percent of the mass of the human body is made up of just four elements: oxygen, carbon, hydrogen and nitrogen, with a lot of that in the form of water. The remaining 4 percent is a sparse sampling of the periodic table of elements

Hope this helps :)

4 0
3 years ago
Read 2 more answers
Other questions:
  • Phosphorus combines with oxygen to form two oxides. Find the empirical formula for each oxide of phosphorus if the percentage co
    11·1 answer
  • Iodine-131 is a radioactive isotope. after 9.00 days, 46.0% of a sample of 131i remains. what is the half-life of 131i?
    8·1 answer
  • Combustion reactions are most conveniently studied _____. hints combustion reactions are most conveniently studied _____. there
    13·1 answer
  • Dolphins communicate using compression waves (longitudinal waves). Some of the sounds dolphins make are outside the range of hum
    5·1 answer
  • Which element is a semiconductor
    15·2 answers
  • What 2 elements on the periodic table add some serious seasoning to boring foods
    11·1 answer
  • Help please ! ASAP neeeeeed and answerrrrrr
    10·2 answers
  • Which one of the following is an example of a balanced chemical reaction?
    13·1 answer
  • Which is a characteristic of weak acids and weak bases?
    13·2 answers
  • Can yall answer the question on the image PLEASE
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!