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
Serhud [2]
3 years ago
11

Which of the following is a correct formula unit of an ionic compound?

Chemistry
2 answers:
goldenfox [79]3 years ago
6 0

Answer : The correct formula unit of an ionic compound is Ca(OH)2

Explanation :

An ionic compound is formed when a metal atom donates one or more electrons to a non metal atom.

During this process, metal gains a positive charge and a nonmetal gets a negative charge.

In an ionic compound, these charges on the ions are balanced so that the overall compound is neutral.

Let us check which of the given compounds have a neutral charge.

1) Al2F3 : Charge on Al is +3 and that on F is -1.

The total charge on 2 Al is 2x3 = +6.

The total charge on 3 F atoms is 3x(-1) = -3

The overall charge on the compound is +6-3 = +3.

That means the given formula unit is not correct.

2) Ca2O : Charge on Ca is +2 and that on O is -2

Total charge on Ca is 2x2 = +4

The overall charge is +4-2 = +2

Therefore the given formula unit is not correct.

3) Ca(OH)2 : The charge on Ca ion is +2 and that on OH is -1.

The total charge on 2 OH ions is 2x(-1) = -2

The overall charge is +2-2 = 0

This gives a neutral compound.

Therefore the given formula unit is correct.


scoray [572]3 years ago
4 0

The answer is C)

Ca(OH)2

I took the test and it was correct

You might be interested in
How many atoms of phosphorus are in 4.5 grams of tetraphosphorus decoxide?
Alexxx [7]

Answer:

In 4.5 grams of tetraphosphorus decoxide we have 3.85 * 10^22  phosphorus atoms

Explanation:

Step 1: Data given

tetraphosphorus decoxide = P4O10

Molar mass of P4O10 = 283.89 g/mol

Mass of P4O10 = 4.5 grams

Number of Avogadro = 6.022 * 10^23 / mol

Step 2: Calculate moles of P4O10

Moles P4O10 = mass P4O10 / molar mass P4O10

Moles P4O10 = 4.5 grams / 283.89 g/mol

Moles = 0.016 moles

Step 3: Calculate moles of P

For 1 mol P4O10 we have 4 moles of phosphorus

For 0.016 moles P4O10 we have 4*0.016 = 0.064 moles P

Step 4: Calculate number of P atoms

Number of P atoms = moles P * number of Avogadro

Number of P atoms = 0.064 moles * 6.022*10^23

Number of P atoms = 3.85 * 10^22 atoms

In 4.5 grams of tetraphosphorus decoxide we have 3.85 * 10^22  phosphorus atoms

3 0
3 years ago
What is the main difference between an isotope and an ion
eimsori [14]
An isotope is the vary of neutrons in an element, causing its atomic mass to change. While an ion is a charged atom that bonds to be stable. 
6 0
3 years ago
Help me i dont understand
Pavlova-9 [17]

Answer:

the answer would be a i did the test

Explanation:

5 0
2 years ago
Esters are generally pleasant smelling compounds<br>True<br>False​
Rzqust [24]

Answer:

True

Explanation:

Esters are generally pleasantly smelling compounds. In fact, the fragrance industry uses esters to produce perfume, as well as uses esters as an ingredient to produce synthetic flavours and cosmetics, all of which have unique and pleasant smells.

8 0
3 years ago
Ionic bonds are strong; therefore, ionic compounds
Bess [88]
This is not a question
what are you asking
8 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASEE HELPP!
    10·1 answer
  • What is pure chemistry and applied chemistry ?
    9·1 answer
  • What is 85% of 352???????????????????
    6·1 answer
  • If you are given only the mass number of neutrons, how do we find an atomic number?
    12·2 answers
  • What type of energy is used to make electrical power from tides
    9·2 answers
  • How many grams of Na2SO4 are required to make 0.30 L of 0.500 M Na2SO4?
    14·1 answer
  • 4.2g of cerium reacted with oxygen to form 5.16g of an oxide of cerium. Find
    12·1 answer
  • Point give away number 5!
    6·2 answers
  • A Write a set of four quantum numbers possible for the circled electron in arsenic (As). (There could be more
    6·1 answer
  • What is Matter and give the examples​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!