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
grigory [225]
3 years ago
10

An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?

Chemistry
1 answer:
agasfer [191]3 years ago
7 0
The mass number of the atom is 39
You might be interested in
Predict the products and then balance the equation
Aneli [31]

\qquad \qquad\huge \underline{\boxed{\sf Answer}}

Here's the balanced equation for given Double displacement reaction ~

\sf Pb(NO_3)_2 +2 \:  KI = PbI_2  +2 \:  KNO_3

The products fored are : Lead Iodide ( PbI2 ) and Potassium Nitrate ( KNO3 )

4 0
2 years ago
Read 2 more answers
In a well-constructed response explain the differences and similarities between Natural Selection and Selective Breeding
lakkis [162]
Natural selection and selective breeding can cause both animal and plant changes. The distinction between the two is that natural selection occurs without human intervention, while selective breeding occurs only when humans interfere. As a result, selective breeding is also known as artificial selection.
6 0
2 years ago
Help please!! I need to turn this in by midnight! EST
nignag [31]

Answer:

FIREWORKS : WHEN FIREWORKS EXPLODE THEY EXPEL SMOKE WHICH IS A FORM OF GAS AND THEY LIGHT UP WHICH IS ANOTHER CHEMICAL REACTION AND OF COURSE THE WHOLE FIREWORK GETS HOT ( Temperature rises )

Explanation:

you could see your reaction happens when original substance changes in color temperature formation produces light or gas in many other things

( besides it's original form! )

answer what changed from it's original form!

ex: baking a cake:

the cake change form ( rising ) due to heat ( rising temperature )

REACTION WAS:

- formation of precipitate ( solid to settle out of a solution )

- change I'm temperature to bake the cake

Extra:

you got this!

I hope I helped even just a little!

8 0
2 years ago
Which is most likely water?​
svp [43]

Answer:

A

it looks like a liquid

Explanation:

4 0
3 years ago
Read 2 more answers
How many moles of MgS2O3 are in 247 g of the compound?
lara [203]
Moles of MgS2O3 = 247/136 = 1.81 moles. Molecular mass of MgS2O3 = 136
6 0
3 years ago
Other questions:
  • How many cu atoms are present in a piece of sterlingsilver jewelry weighing 33.24 g ? (sterling silver is a silver–copper alloy
    12·1 answer
  • Consider the following intermediate chemical equations. When you form the final chemical equation, what should you do with CO? C
    10·1 answer
  • Mnemonic device for remembering the four layers of the atmosphere?
    11·2 answers
  • What organelle of a prokaryotic cell contains genetic information?
    11·1 answer
  • In the chemical reaction, calcium carbonate (CaCO3) was heated to form two new
    10·1 answer
  • A man of 450 N covers an area of 0.0015m2 while standing on his feet.calculate the pressure exerted by him on the ground.
    12·1 answer
  • How many grams of H2O are produced when 35.0 g of NaOH reacts with 17.5 g of CO,?
    5·1 answer
  • Aspirin is one of the Aesthetic Values of biodiversity<br><br> true<br> false
    14·1 answer
  • Damian places a negatively charged balloon in a magnetic field. Which direction will the balloon move?
    13·1 answer
  • Give Me a simple definition for Acids.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!