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
madam [21]
3 years ago
8

Why does the mass number only include the number of protons and the neutrons (not electrons)?

Chemistry
1 answer:
docker41 [41]3 years ago
4 0

Answer:

The mass number (A) of an atom is the total number of protons and neutrons in its nucleus. ... Because electrons have virtually no mass, just about all the mass of an atom is in its protons and neutrons. Therefore, the total number of protons and neutrons in an atom determines its mass in atomic mass units (Table 4.5. 1).

You might be interested in
A chemist has 3.55x1022 molecules of nitrogen monoxide. How
Alina [70]

Answer:

<h2>0.059 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{3.55 \times  {10}^{22} }{6.02 \times  {10}^{23} }  \\  = 0.05897...

We have the final answer as

<h3>0.059 moles</h3>

Hope this helps you

6 0
3 years ago
Compare the density of the ocean crust and the continental crust. If they were to collide, predict which one would push under th
uysha [10]

Answer:

The difference between the density of the ocean crust and the continental crust is the fact that the ocean crust is denser than the continental crust. Meaning, the continental crust is likely to push over the oceanic crust considering it has less dense.

Explanation:

I hope this helps, the last time I learned this was in 5th grade and I am i currently in the 11th grade....

5 0
3 years ago
C
Schach [20]

Answer:

2.74 M

Explanation:

Given data:

Mass of sodium chloride = 80.0 g

Volume of water = 500.0 mL

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Now we will convert the mL into L.

500.0 mL× 1 L /1000 mL =  0.5 L

In next step we will calculate the number of moles of sodium chloride.

Number of moles = mass/molar mass

Number of moles = 80.0 g/ 58.4 g/mol

Number of moles = 1.37 mol

Molarity:

M =  1.37 mol/ 0.5 L

M =  2.74 M

8 0
3 years ago
Which family (metals, nonmetals, or inert gases) generally has the valence electrons which are the easiest to remove from the at
zubka84 [21]
<span>Which family (metals, nonmetals, or inert gases) generally has the valence electrons which are the easiest to remove from the atom?
</span>
The Correct Answer Is:  Metals

Hope I Helped :D

Brainliest?


-Nullgaming650
4 0
3 years ago
Read 2 more answers
The electrons stripped from glucose in cellular respiration end up in which compound? The electrons stripped from glucose in cel
Airida [17]
The final destination to where some of the electrons go to at the end of cellular respiration would be D. Oxygen. Assuming that this aerobic cellular respiration, the final electron acceptor is that of oxygen.
6 0
3 years ago
Other questions:
  • When a substance goes from a gas to a liquid, it goes through a ________ change.
    12·1 answer
  • How many moles are there in 1.2 x 10^2 atoms of sulfur
    14·1 answer
  • Help me please, will give brainly
    14·2 answers
  • Is limestone a reactant or a product
    10·1 answer
  • A "carat" is a unit of mass defined as exactly ⅕ of a gram. There are exactly 5 carats in a gram. How many carats would a 1.0 mL
    8·1 answer
  • This is an underground level where the ground becomes saturated with water.
    7·2 answers
  • Câu 36: _VD _Hình lập phương có thể tích là 1253 thì diện tích đáy là:
    15·2 answers
  • SHOW WORK<br> A football field is 120.0 yards long, how long is a football field in inches?
    7·1 answer
  • A sample of gas contains 0.1700 mol of OF2(g) and 0.1700 mol of H2O(g) and occupies a volume of 19.5 L. The following reaction t
    11·1 answer
  • Given the balanced equation representing a reaction:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!