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
Sophie [7]
2 years ago
13

Potassium has a mass number of 40 and an atomic number of 19. how many protons does it have?

Chemistry
1 answer:
ratelena [41]2 years ago
6 0
19. The atomic number is the same as protons and electrons unless it have a - or a + charge the electrons are going to change
You might be interested in
Which of the following pairs of reactants will react together to produce water (H2O) as one of the products?
Rainbow [258]
1) <span>NaNO3 and H2O - no reaction , it is dissolution
2) no hydrogen to make water
3) </span><span>Fe(OH)3 (base) and H2SO4(acid)) 
base +acid ----> salt +water
4) </span><span>Li2O and Ba(OH)2
basic oxide and base ----> no reaction

so Answer number 3)
</span> 2Fe(OH)3 +3 H2SO4 ------>   Fe2(SO4)3 + 6H2O<span>

</span>
7 0
3 years ago
Read 2 more answers
How the Atmosphere affects the Biosphere pls help
guapka [62]

Answer:

Explanation:

Air pollutants also affect the biosphere in turn. Ozone and acid deposition suppress plant growth; meanwhile, aerosols and their indirect effects on clouds decrease total photosynthetically active radiation (PAR) while increasing the diffuse fraction.

6 0
2 years ago
If a leaf and a dime are dropped from the same height, what force will cause the leaf to fall more slowly?
Veronika [31]
It's friction, but friction in air is called Air Resistance. So, that's your answer.
8 0
3 years ago
A reversible reaction is a reaction that takes place in the (blank). If the reaction were to(blank) , the rate of the forward re
svetoff [14.1K]

A reversible reaction is a reaction that takes place in the ( formation of reactants to products and products to reactants simultaneously ). If the reaction were to ( be in dynamic equilibrium ), the rate of forward reaction would be equal to that of the reverse reaction.

hope this helps :))

3 0
3 years ago
Read 2 more answers
Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the suga
iren2701 [21]

Maple syrup is a solution, all of the chemicals in maple syrup are dissolved in water.

8 0
3 years ago
Other questions:
  • What is not true about most combustion reactions?
    13·1 answer
  • Which component within a nuclear reactor directs neutron bombardment? turbine
    6·2 answers
  • What happens to the number of valence electrons as you move from left to right in the periodic table?
    13·1 answer
  • What is the force caused by wind pushing on a building?
    9·1 answer
  • An alkane with the formula C6H14 can be prepared by hydrogenation of either of two precursor alkenes having the formula C6H12.
    10·2 answers
  • 6. Mia and her best friend Claudia are comparing eye colors. Mia has blue eyes, and Claudia has brown eyes. What is a difference
    6·2 answers
  • What is a displacement reaction
    7·2 answers
  • What kind of questions do scientists ask?
    6·1 answer
  • What biological factors and/or actions<br> contribute to increases in entropy?
    7·1 answer
  • 6. If the broken wire of the top branch
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!