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
MAVERICK [17]
3 years ago
6

What is the mass number of an atom that contains 85 protons 133 neutrons and 85 electrons​

Chemistry
1 answer:
Vikentia [17]3 years ago
6 0
The mass would be the sum of the protons and neutrons. Your answer would be 218
You might be interested in
21 mL It required 42.35 mL of H2SO4 to neutralize 21.17 mL of 0.5000 M NaOH. Calculate the concentration of H2SO4
bija089 [108]
The balanced equation for the above reaction is 
2NaOH + H₂SO₄ ---> Na₂SO₄ + 2H₂O
stoichiometry of NaOH to H₂SO₄ is 2:1
number of NaOH moles required-0.5000 M / 1000 mL/L x 21.17 mL = 0.010585 mol
According to stoichiometry, acid moles required are 1/2 of the base moles reacted
Therefore number of H₂SO₄ moles reacted - 0.010585 /2  mol
Number of moles in 42.35 mL of H₂SO₄ - 0.010585 /2 mol
Therefore in 1 L solution - (0.010585) /2 / 42.35 mL x 1000 mL/L = 0.125 M
Molarity of H₂SO₄ - 0.125 M
5 0
3 years ago
If half of the moon is always illuminated why does its appearance from earth change?
irina [24]

Answer:

The different angles the moon has from sunlight to the earth

Explanation:

3 0
2 years ago
Read 2 more answers
For elements in the third row of the periodic table and beyond, the octet rule is often not obeyed. a friend of yours says this
Rom4ik [11]

The reason that some of the elements of period three and beyond are steady in spite of not sticking to the octet rule is due to the fact of possessing the tendency of forming large size, and a tendency of making more than four bonds. For example, sulfur, it belongs to period 3 and is big enough to hold six fluorine atoms as can be seen in the molecule SF₆, while the second period of an element like nitrogen may not be big to comprise 6 fluorine atoms.  

The existence of unoccupied d orbitals are accessible for bonding for period 3 elements and beyond, the size plays a prime function than the tendency to produce more bonds. Hence, the suggestion of the second friend is correct.  


4 0
3 years ago
Help please !!!!!!!!!!
Vedmedyk [2.9K]
25 sugar because the mass should be equal on both sides
5 0
3 years ago
If you change number of neutrons in an atom, you will also change its-
ikadub [295]

Answer:

atomic mass. You will have created an isotope.

Explanation:

5 0
3 years ago
Other questions:
  • Two atoms of the same substance wi the different numbers of neutrons are called what
    14·1 answer
  • How many liters of oxygen gas, at standard temperature and pressure, will react with 35.4 grams of calcium metal? Show all of th
    5·1 answer
  • How many molecules are in 4.5 moles of H2O?
    15·1 answer
  • An atom of oxygen (atomic number 8) with an atomic mass of 16 would have how many neutrons?
    10·1 answer
  • 9 What 11 letter word describes the chemical balance within an organism?
    12·1 answer
  • What is the mass percent of chlorine in chlorine flouride if 5.753g of chlorine and 9.248g of fluorine combine to create chorine
    11·1 answer
  • In a collision, a 25.0 kg mass moving at 3.0 m/s transfers all of its momentum to a 5.0 kg mass. What is the velocity of the 5.0
    6·1 answer
  • Question 21 of 25
    9·1 answer
  • Please tell me the answer I will mark you brainliest
    9·2 answers
  • Use a reference source to identify five facts about a neutron star or a black hole. Don’t forget to cite your sources.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!