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
lozanna [386]
2 years ago
9

When a 4.2 gram sample of mercury (Il) oxide, HgO is decomposed into its elements by •

Chemistry
1 answer:
Usimov [2.4K]2 years ago
7 0

Hg = (3.2 : 4.2) x 100% = 76.19%

O = (1 : 4.2) x 100% = 23.81%

You might be interested in
Both protons and neutrons are located inside the nucleus of an atom. Changing the number of neutrons in the nucleus would form d
skelet666 [1.2K]
By changing the number of protons in an element, you are fundamentally changing it to a different element.

It’s worth remembering that:

Protons identify the element

Electrons determine properties and behavior of the element

Neutrons contribute to isotopes and just help keep everything stable, by separating the charges. Remember opposites attract. Like charges repel.
6 0
3 years ago
How many moles are in 7.8g of CaO?
Bess [88]

This compound is also known as Calcium Oxide. The SI base unit for amount of substance is the mole. 1 grams CaO is equal to 0.017832495800447 mole. Note that rounding errors may occur, so always check the results.

Hope I helped :)

4 0
3 years ago
Draw a negative relationship between variables
ankoles [38]
I hope this helped♡ I drew the realationship of variables

5 0
3 years ago
Which types of changes must follow the law of conservation of mass? (2 points)
Oksana_A [137]
Both Physical and chemical changes.
4 0
3 years ago
Ca+HCI—>CaCI2+H2, what is the reaction?
arsen [322]

Answer:

single replacement reaction

Explanation:

This is a kind of single replacement reaction where you switch either cations or anions. Here you switched Ca for H and produced Cacl2 and H2 gas by itself.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Describe some ways you could keep ice from melting over a long period of time?
    8·1 answer
  • Select the correct answer.
    8·2 answers
  • PLEASE HELP !
    6·1 answer
  • Calculate the mass percent of a solution that is prepared by adding 68.1 g of NaOH to 341 g of H20.
    7·1 answer
  • Calculate the theoretical yield for the amount of sodium carbonate produced as a result of this chemical reaction. Record your f
    6·1 answer
  • Wood is A)element B)compound C)mixture​
    11·1 answer
  • Oxygen
    12·2 answers
  • If you wanted to make .5 L of a 1 mole/L (M) of MgSO4 solution, how many grams of MgSO4 would you use?
    11·1 answer
  • Which of following is true of liquids?
    14·2 answers
  • What is rate in chemistry
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!