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
attashe74 [19]
2 years ago
12

Define mass number of an atom.​

Chemistry
1 answer:
Georgia [21]2 years ago
6 0
The mass number of an atom is basically the total number of protons and neutrons.
You might be interested in
How many liters of CO2 are in 4.76 moles? (at STP)
dem82 [27]

<u>Answer:</u> The volume of carbon dioxide gas at STP for given amount is 106.624 L

<u>Explanation:</u>

We are given:

Moles of carbon dioxide = 4.76 moles

<u>At STP:</u>

1 mole of a gas occupies a volume of 22.4 Liters

So, for 4.76 moles of carbon dioxide gas will occupy a volume of = \frac{22.4L}{1mol\times 4.76mol=106.624L

Hence, the volume of carbon dioxide gas at STP for given amount is 106.624 L

6 0
3 years ago
If atoms of a halogen nonmetal (Group 17) gains one electron, the atoms the have __.
RUDIKE [14]

Hm, this could be more than one option, but gaining electrons makes a negative charge, so

If atoms of a halogen nonmetal (Group 17) gains one electron, the atoms the have "a negative one charge".

8 0
3 years ago
Read 2 more answers
What is the cost of coal in dollars per ton if it costs $0.04 per kilogram?
Anettt [7]

Answer:

36.2874 $

Explanation:

1 ton = 907.185 kilograms.

907.185 x 0.04 =

36.2874

<em>-kiniwih426</em>

8 0
3 years ago
Using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy ch
vlabodo [156]
In order to solve this, we need to make use of Hess' Law.

We are already given the equations and their corresponding deltaH. Using Hess' Law, we can generate this equation:
104 kJ = x - (-1182 kJ) - (-1144 kJ)

Among the choices, the answer is
<span>B.104 = x - [(-1182) + (-1144)] 
</span>
3 0
3 years ago
Read 2 more answers
Describe the difference between Al3+<br> and N3-
wariber [46]
Al3+ is cation due to its positve charge
N3- is an anion due to its negative charge
4 0
3 years ago
Other questions:
  • A 1.00 l sample of water contains 0.0036 g of cl- ions. determine the concentration of chloride ions in ppm if the density of th
    5·1 answer
  • When atoms combine they form<br> A. molecules<br> B.periodic table<br> C.particles<br> D.protons
    12·1 answer
  • After reading “The Crisis, No. 1,” what do you think Paine means by the line, "These are the times that try men’s souls"? Cite e
    8·2 answers
  • A compound is found to contain 64.80% carbon. 13.62% hydrogen. And 21.58% oxygen by weight. What is the empirical formula for th
    8·2 answers
  • Calculate the value of K p for the equation C ( s ) + CO 2 ( g ) − ⇀ ↽ − 2 CO ( g ) K p = ? given that at a certain temperature
    9·1 answer
  • Which of the following sequence is correct for the oxidation of alcohol?
    13·1 answer
  • On the periodic table, which groups of elemen tend to positive ions? A. Group 1 and Group 2 B. Group 16 and Group 17 C. Group an
    11·1 answer
  • Which characteristic is not common to outer planets? Question 3 options: They support rung systems They have no solid surface Th
    14·2 answers
  • If a disease strikes the snake population in the food chain shown, what will happen to the populations of hawks?
    5·1 answer
  • Why do u think perchloric acid made a hole on the glass?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!