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
Brut [27]
2 years ago
7

Calculate the number of neutrons in potassium-40.

Chemistry
2 answers:
arsen [322]2 years ago
6 0
Potassium electrons=19, protons =electrons. No of neutrons= no of mass - no of protons. 40-19=21.Ans =21 neutrons
dsp732 years ago
5 0

Answer:

21 neutrons

Explanation:

There are 21 neutrons in Pottasium-40

You might be interested in
Balance this chemical formula<br> Fe + Cl2 = FeCl3
san4es73 [151]
First you find out how much each element has

Fe=1 * 2                    Fe=1
Cl=2  *3                   Cl=3 *2

now we multiply each so we can balance each side.

So now we get our balanced equation
2 Fe + 3 Cl2 = 2 FeCl<span>3</span>
5 0
2 years ago
Read 2 more answers
Which of the compounds below will ionize in
-BARSIC- [3]
I need help on this one
5 0
2 years ago
Read 2 more answers
Which statement about relative motion is not true?
AURORKA [14]

Explanation:

laws of physics which apply when you are at rest on the earth also apply when you are in any reference frame which is moving at a constant velocity with respect to the earth. For example, you can toss and catch a ball in a moving bus if the motion is in a straight line at constant speed.

7 0
2 years ago
NEED HELP QUICK!!!!!!!!!!!!!!
denis23 [38]
The compounds that are produced upon this combustion reaction would be Carbon Dioxide and water.

CO2 = Carbon and Oxygen
H2O = Hydrogen and Oxygen.

The exact molecular amounts or moles can be determined by balancing this combustion reaction.
3 0
2 years ago
Read 2 more answers
A habit is: <br>pls help me ty​
kherson [118]
What class is this? (Subject)
4 0
2 years ago
Read 2 more answers
Other questions:
  • If 25.0 mL of 0.451 M NaOH solution is titrated with 0.253 M H2SO4, the flask at the endpoint will contain (besides the indicato
    13·1 answer
  • 179.1 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 16.1oC. After 306.9 g
    8·1 answer
  • if the mole fractio of NaCl in an aqueous solution is 0.0927, what is the wt/wt% (percent by mass) of NaCl
    12·1 answer
  • Calculate the molality of a 15.0% by mass solution of MgCl 2 in H 2O. The density of this solution is 1.127 g/mL. Group of answe
    7·1 answer
  • 2. 7.5 g of potassium react with water to produce potassium hydroxide and hydrogen gas. Calculate the mass of potassium hydroxid
    11·1 answer
  • What is the charge of an aluminum ion? (2 points) Select one: a. 2+ b. 3+ c. 2- d. 3-
    8·1 answer
  • When 2.00 g of methane are burned in a bomb calorimeter, the change in temperature is 3.08°C. The heat capacity of the calorimet
    7·1 answer
  • Which subatomic particles have approximately the same mass?
    12·2 answers
  • Na CO₂ (aq)<br>+ CH3 COOH(aq) +​
    10·2 answers
  • Hello people ~<br>help me with these questions ​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!