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
lilavasa [31]
3 years ago
9

Will name Brainliest

Chemistry
1 answer:
noname [10]3 years ago
3 0

Answer:

a

Explanation:

You might be interested in
The mole is defined as the amount of a substance containing the same number of particles as exactly 12 g of C-12. The amu is def
Pavlova-9 [17]

Answer:

Because it wouldn't make any sense

Explanation:

First of all, I think it's important to highlight the definition of isotope.

Isotope (Wikipedia): Variants of a particular chemical element <u>which differ in neutron number</u>...

This means that two isotopes are the same element but have different net mass per atom, due to the different number of neutrons.

Therefore, it's important to make the definition on the same isotope so that the proportion is equal. If the definition would be made on different isotopes, the proportion wouldn't have any sense. Let me be clear with this example:

mass in grams of a C-12 atom = 1.9944235 × 10 ^ -23 g  --> this is the mass of a single C atom.

By definition --> 1 mol of anything = 6.02 x 10 ^ 23 particles of anything

Therefore, we know how much a single C atom weights. How many grams do you think that 6.02 x 10 ^ 23 atoms of C (i.e a mol of C) could weight??

1 single C atom ----------------------------- 1.9944235 × 10 ^ -23 g

6.02 x 10 ^ 23 atoms of C   ------------ <u>12.006 g  !!</u>

These 12 g is the same quantity than above! Therefore, 1 mol of C weights 12 g. If the definition were made with 13 g of C-13 (the other C isotope), these numbers will not be the same --> There would be a contradiction.

Regarding the second question, we need to search Ne-20 atomic mass in grams -->  3,3509177 × 10 ^ -23 g

Hence, if we follow the same rule, the amu would be 1/12 of Ne-20.

[ 3,3509177 × 10 ^ -23 g ] / 12 = 2.79 ^ -24 g

3 0
3 years ago
The scientist most often credited with the idea that a quantum of light (photon) can act as a particle is:
Lorico [155]
C.) It was Einstein who created quantum of light
4 0
3 years ago
Read 2 more answers
Raw meat can spread pathogens. Which statement describes the best way to prevent the spread of foodborne illness?
Archy [21]
C.) wash hands, utensils, and surfaces with hot soapy water
7 0
3 years ago
Read 2 more answers
chegg write a net ionic equation describing the oxidation of no2 2 to no3 2 by o2 in a basic solution.
Marina86 [1]

When the same species undergoes both oxidation and reduction in a single redox reaction, this is referred to as a disproportionation. Therefore, divide it into two equal reactions.

NO2→NO^−3

NO2→NO

and do the usual changes

First, balance the two half reactions:

3. NO2 +H2O →NO^−3 + 2 H^+ + e−

4. NO2 +2 H^+ + 2e− → NO + H2O

Now multiply one or both half-reactions to ensure that each has the same number of electrons. Here, Eqn (3) x 2 results in each half-reaction having two electrons:

5. 2 NO2 + 2 H2O → 2 NO^−3 + 4H^+ + 2e−

Now add Eqn 4 and 5 (the electrons now cancel each other):

3NO2 + 2H^+ + 2H2O → NO + 2 NO−3 + H2O + 4H+

and cancel terms that’s common to both sides:

3NO2 + H2O → NO + 2NO^−3 + 2H+

This is the net ionic equation describing the oxidation of NO2 to NO3 in basic solution.

Learn more about balancing equation here:

brainly.com/question/26227625

#SPJ4

7 0
1 year ago
Can somebody help me plz
xxMikexx [17]

Answer:r=1.2 d=2.4

Explanation:

Radius is half the diameter and the diameter is 2.4 m

8 0
3 years ago
Read 2 more answers
Other questions:
  • Explain how chemical change differs from a physical change
    5·2 answers
  • The reactants collect ____. ____ energy from the sun drives chemical reactions. The products include gluecose and ____, which is
    8·2 answers
  • How many moles of iron can be recovered from 100.0 kg fe3o4?
    6·2 answers
  • What is a system called when neither energy nor matter is exchanged between the system and the surroundings?
    5·1 answer
  • Which statement below is TRUE? View Available Hint(s) Which statement below is TRUE? Acids are classified as alkaloids. Acids ca
    15·1 answer
  • How to make a covalent bond
    6·2 answers
  • 3. The Periodic Law states that the chemical
    11·1 answer
  • What is the density of object C? Does it sink or float in water?
    14·2 answers
  • Suppose you boil an egg. What kind of change is taking place?
    10·2 answers
  • CH3-CH=CH3-CH what is the name of this structure? <br>​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!