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
jonny [76]
3 years ago
5

What information is needed to calculate the average atomic mass of an element?(1 point)

Chemistry
1 answer:
g100num [7]3 years ago
7 0

Answer:

Taking into account the definition of average atomic mass and isotopes of an element, the information that you need is the masses of its isotopes and their percent abundances.

Each chemical element is characterized by the number of protons in its nucleus, which is called the atomic number Z.

But in the nucleus of each element it is also possible to find neutrons, whose number can vary. The atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus.

The same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.

The atomic mass of an element is the weighted average mass of its natural isotopes. Therefore, the atomic mass of an element is not a whole number.

The weighted average means that not all isotopes have the same percentage.

In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.

Explanation:

You might be interested in
Which equation represents positron decay?
jonny [76]

Answer: 4

Explanation:

4 is the only one that has to products as well as having the plus at the bottom

8 0
2 years ago
In covalent bonds, atoms share electrons to fill up energy levels.<br><br> True or False
Nadusha1986 [10]

TRUE

Explanation:

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability. By sharing their outer most electrons, atoms can fill up their outer electron shell and gain stability. So, it is true.

7 0
3 years ago
What mass of silver nitrate will be needed to react with 125 grams of magnesium chloride?
Gennadij [26K]

Answer:   m =  4.2 gAgCl

Explanation:  

5 0
2 years ago
How many moles of iron(III) hydroxide precipitate will form when 2.7 moles of aqueous sodium hydroxide reacts completely with ex
aalyn [17]

Answer:

0.9 mole of Fe(OH)3.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

Fe(NO3)3 + 3NaOH —> Fe(OH)3 + 3NaNO3

Now, we can determine the moles of iron (III) hydroxide formed from the reaction as follow:

From the balanced equation above,

3 moles of NaOH reacted to produce 1 mole of Fe(OH)3.

Therefore, 2.7 moles of NaOH will react to produce = 2.7/3 = 0.9 mole of Fe(OH)3.

Therefore, 0.9 mole of Fe(OH)3 is produced from the reaction.

7 0
3 years ago
Which half-reaction correctly represents reduction? *
nasty-shy [4]

Answer:

C

Explanation:

Reduction can be seen through addition (gaining) of electrons, addition of Hydrogen or removal of Oxygen

Mn7+ is reduced to Mn4+ by the addition of 3 electrons.

3 0
3 years ago
Other questions:
  • An 11.75 g sample of a common hydrate of cobalt(ii) chloride is heated. after heating, 9.25 g of anhydrous cobalt chloride remai
    6·1 answer
  • Whuch expression is equal to the number of grams in 2.43 kg
    8·1 answer
  • The molecular mass of the compound is 90 amu. What is the molecular formula for C2H5O?
    12·2 answers
  • The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrogen fluoride.
    11·1 answer
  • When 7.085 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 21.71 grams of CO2 and 10.37 grams of H
    12·1 answer
  • Are parts of the circulatory system<br> .The<br> , and
    10·1 answer
  • iron combines with oxygen to form rust. given the chemical reaction, how many grams of rust would be produced if 3 grams of reac
    14·1 answer
  • The use of uranium-238 to determine the age of a geological formation is a beneficial use of
    8·1 answer
  • How does a balanced chemical equation demonstrate the Law of Conservation of Mass?
    14·1 answer
  • The table shows columns that brenda uses for her notes on the properties of elements. her notes state that some elements can rea
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!