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
Oxana [17]
3 years ago
15

In a percentage composition investigation a compound was decomposed into its elements: 20.0 g of calcium, 6.0 g of carbon, and 2

4.0 g of oxygen. Determine the percentage composition of this compound
Chemistry
1 answer:
inysia [295]3 years ago
3 0

The percentage composition of this compound : 40%Ca, 12%C and 48%O

<h3>Further explanation</h3>

Given

20.0 g of calcium,

6.0 g of carbon,

and 24.0 g of oxygen.

Required

The percentage composition

Solution

Total mass of compound :

=mass calcium + mass carbon + mass oxygen

=20 g + 6 g + 24 g

=50 g

Percentage composition :

  • Ca-calcium

\tt \dfrac{20}{50}\times 100\%=40\%

  • C-carbon

\tt \dfrac{6}{50}\times 100\%=12\%

  • O-oxygen

\tt \dfrac{24}{50}\times 100\%=48\%

You might be interested in
Q #4 please help if you are sure
Mashutka [201]

(Answer) (d) Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.

Rate of a chemical reaction refers to rate of formation of products from reactions during a chemical reaction. The rates of chemical reactions depend on various factors such as temperature, pressure, concentration of reactants, presence of catalyst etc. For this reason, chemical reaction rates vary with the conditions of the reaction.

Nuclear decay rate refers to the constant ratio of the number of atoms of radioactive nucleus that decay during a certain interval of time to the total number of radioactive atoms at the beginning of the time interval. Nuclear decay rates are constant and do not vary with the conditions of the reaction.

8 0
3 years ago
Explain the difference between a physical property and a chemical property
Eduardwww [97]
Physical property-  is an aspect of matter that can be observed or measured without touching changing it.

Chemical property- may only be observed by changing the chemical identity of a substance.

The difference would be that for physical property's you dont need to do anything to figure out what they are, but for chemical properties you need to change something to observe them.

5 0
3 years ago
What is the definition of the molar mass of an element or compound?
VashaNatasha [74]

Answer:

The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance(mol) .

Explanation:

hope it may help you

mark as brainlist please

8 0
3 years ago
What is the name of the molecular compound CBra?​
Fudgin [204]

Answer:

i think it is a Cobrotoxin

6 0
3 years ago
What is the main purpose of using NaOH in the saponification reaction . NaOH works as the catalyst b. NaOH solution is the solve
Alex777 [14]

Answer:

C. NaOH acts as a reactant in the reaction

Explanation:

Because during the saponification process, Na+ replaces the H+ in the fatty acid been used for the saponification process

7 0
3 years ago
Other questions:
  • What element has the same valence electrons as carbon A) N B) AI C) Si or D) Be
    9·1 answer
  • CHEM HELP PLSSSSS, I SUCK AT CHEM
    5·1 answer
  • Why is a solid recrystallized with the minimum of hot solvent?
    7·1 answer
  • Where does Ta, Os, Rh comes from?
    12·1 answer
  • The formula for dichlorine monoxide
    6·2 answers
  • Where should you place the title when constructing a graph?
    12·2 answers
  • What can you predict from an element's location on the periodic table?
    7·1 answer
  • Kinetic Energy Problems = KE = 0.5m x 12
    12·1 answer
  • What happens when Magnesium hydroxide is heated? (Decomposition)
    15·2 answers
  • Can anybody help??
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!