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
ryzh [129]
4 years ago
8

How many neutrons does element X have if it’s atomic number is 28 and it’s mass number is 81?

Physics
2 answers:
Sedaia [141]4 years ago
8 0

The answer is 53,hope this help

Sauron [17]4 years ago
3 0

Answer:

53

Explanation:

M-A=N

Mass-Atomic #= Neutrons

81-28= 53

You might be interested in
I want friends comment your email and ill hit you up
eimsori [14]

Answer:

ddddbdhxhhxhhbb

Explanation:

6 0
3 years ago
Read 2 more answers
A car is moving 18 m/s to the east. if it takes the car 5 seconds to reach a velocity of 19 m/s to the east, what is its acceler
almond37 [142]
<span>C. 0.2 m/s2 east

Hope it helps!
</span>
5 0
3 years ago
Read 2 more answers
Which of these is an experiment generally regarded as being first carried out by James Joule?
kipiarov [429]
The correct answer for this question is this one: "measuring the temperature increase of water from doing work stirring it." This experiment is generally regarded as being first carried out by James Joule is this one, <span>measuring the temperature increase of water from doing work stirring it.</span>
5 0
4 years ago
A car starts from rest and accelerates at 5 m/s/s.
goldenfox [79]

Please find attached photograph for your answer. Hope it helps. Please do comment

3 0
3 years ago
The gas in a balloon has T=280 K and V=0.0279 m^3. if the temperature increases to 320 K at constant pressure, what is the new v
victus00 [196]

Answer:

0.0319 m³

Explanation:

Use ideal gas law:

PV = nRT

where P is pressure, V is volume, n is amount of gas, R is the gas constant, and T is temperature.

Since P, n, and R are held constant:

n₁ R / P₁ = n₂ R₂ / P₂

Which means:

V₁ / T₁ = V₂ / T₂

Plugging in:

0.0279 m³ / 280 K = V / 320 K

V = 0.0319 m³

8 0
3 years ago
Other questions:
  • Over a period of one year, how much of the overall (night) sky would a Bellingham observer be able to see?
    10·1 answer
  • If you drew magnetic field lines for this bar magnet, which statement would be true
    11·2 answers
  • Why degree F is best to measure accurate temperature<br>​
    10·1 answer
  • An increase in temperature the kinetic energy and average speed of the gas particles. As a result, the pressure on the walls of
    8·1 answer
  • Which behavior is not true for incident rays striking a concave mirror? a. incident rays parallel to the principal axis are refl
    10·1 answer
  • Two students who live on planet X. They want to estimate the circumference. The two students synchronize their watches before on
    12·1 answer
  • Can someone pls explain this question to me. Thanks in advance! ​
    11·1 answer
  • What is a combination of two or more simple machines? a complicated machine, a compound machine ,a compiled machine, a converted
    8·2 answers
  • An object's buoyant force and weight mean the same thing.<br><br>A. True<br><br>B. False​
    6·1 answer
  • Use of lubricants increase efficency of machine​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!