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
Virty [35]
3 years ago
9

An atom contains 31 protons,39neutrons and 31 electrons.Identify the mass number of this atom​

Chemistry
1 answer:
AlladinOne [14]3 years ago
5 0

Answer:

Atomic mass =70

Explanation:

Mass number is total protons +total neutrons

You might be interested in
SO2+02➡SO3 <br>balance chemical equation​
Slav-nsk [51]

Answer:

2S02 + O2 ---> 2SO3

<u><em>Its</em><em> </em><em>balanced</em><em> </em><em>now</em><em> </em><em>as</em><em> </em><em>Reactants</em><em> </em><em>=</em><em> </em><em>Products</em><em>.</em><em> </em></u>

8 0
2 years ago
What is the answer to this chemistry question?
olga_2 [115]

Answer:

The answer to your question is remplacement double

Explanation:

Data

Lead (II) nitrate = Pb(NO₃)₂

Potassium iodide = KI

Process

1.- Write the balanced chemical reaction

             Pb(NO₃)₂  +  2KI  ⇒   PbI₂  +  2KNO₃

2.- Conclusion

This is a remplacement double reaction because there are two reactants that interchange cations and the products are a combination of the reactants.

5 0
3 years ago
What is the volume of a board that measures 1.8cm by 8.8cm by 30.5cm?
Colt1911 [192]
438,12 cubic centimeters
7 0
3 years ago
What factors influence the gravitational forces between objects?
lisabon 2012 [21]

Explanation:

F = k.m1.m2/r²

m1 and m2: masses of objects

r: distance between the objects

k: a constant

5 0
3 years ago
How much iron is present in 7.59 g of iron(iii) oxide? answer in units of g?
Verdich [7]
You need the unit of g however you must convert to moles before you can use the mole ratio to find the moles of iron, you used the molar mass of iron to find the grams of iron. since F e 2 o 3 

4 0
3 years ago
Other questions:
  • When it became too hot to stay outside during a summer birthday party, the party was moved inside to an air-conditioned porch. I
    12·1 answer
  • A food web shows
    6·1 answer
  • What are the characteristics of a continental drift?
    5·1 answer
  • What is the key characteristic of an oxidation–reduction reaction?
    14·2 answers
  • What advances in science have been made as a result of radiometric dating?
    15·1 answer
  • Mutations in certain genes of bacteria cause them to be resistant to powerful antibiotics. What type of mutation is this for the
    5·2 answers
  • A gas gas a volume of 4.0 liters at a pressure of 0.80 atm. What is the volume if the pressure is changed to 0.40 atm at a const
    9·1 answer
  • Will give brainliest
    11·1 answer
  • What do calories provude for the human body?
    14·2 answers
  • 5. A sample of carbon dioxide (CO2) has a mass of 52.0 g.<br> a. How many carbon atoms are present?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!