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
Natasha2012 [34]
2 years ago
10

Describe the difference between pure substance and mixtures ( give an example each)

Chemistry
2 answers:
kondaur [170]2 years ago
4 0

Answer:

a pure substance consists only of one element or one compound

a mixture consists of two or more different substances, not chemically joined together.

examples:

pure substance : Hydrogen gas - Diamond - Gold metal.

mixture : water and oil - mixtures of sand and water - trail mix

Explanation:

forsale [732]2 years ago
4 0
Few examples of pure substances include steel, iron, gold, diamond, water, copper, and many more. Air is also often considered as a pure substance.

Some examples of mixtures are:

Sand and water.
Salt and water.
Sugar and salt.
Ethanol in water.
Air.
Soda.
Salt and pepper.
Solutions, colloids, suspensions.
You might be interested in
In 1860, Chemists could make which of the following statements about the known chemical elements?
LenKa [72]

Answer:

b. Some had similar properties

3 0
3 years ago
The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 2.7 cm by 1.2 cm by 14.3 cm.
Fofino [41]

Answer:125.0964g

Explanation:

Density = mass/volume

Density = 2.7 gcm-3

Volume=2.7*1.2*14.3=46.332

Mass=?

Mass= density* volume

= 2.7× 46.332=125.0964g

4 0
3 years ago
Consider a general reaction
choli [55]

Answer:

a) K = 5.3175

b) ΔG = 3.2694

Explanation:

a) ΔG° = - RT Ln K

∴ T = 25°C ≅ 298 K

∴ R = 8.314 E-3 KJ/K.mol

∴ ΔG° = - 4.140 KJ/mol

⇒ Ln K = - ( ΔG° ) / RT

⇒ Ln K = - ( -4.140 KJ/mol ) / (( 8.314 E-3 KJ/K.mol )( 298 K ))

⇒ Ln K = 1.671

⇒ K = 5.3175

b) A → B

∴ T = 37°C = 310 K

∴ [A] = 1.6 M

∴ [B] = 0.45 M

∴ K = [B] / [A]

⇒ K = (0.45 M)/(1.6 M)

⇒ K = 0.28125

⇒ Ln K = - 1.2685

∴ ΔG = - RT Ln K

⇒ ΔG = - ( 8.314 E-3 KJ/K.mol )( 310 K )( - 1.2685 )

⇒ ΔG = 3.2694

7 0
3 years ago
What is a potential risk of genetically modified food?
Ivahew [28]

It would be D since it could be unhealthy for you.

6 0
3 years ago
Read 2 more answers
8
love history [14]

Answer : The molar concentration of sucrose in the tea is, 0.0549 M

Explanation : Given,

Mass of sucrose = 3.765 g

Volume of solution = 0.200 L

Molar mass of sucrose  = 342.3 g/mole

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Mass of sucrose}}{\text{Molar mass of sucrose}\times \text{Volume of solution (in L)}}

Now put all the given values in this formula, we get:

\text{Molarity}=\frac{3.765g}{342.3g/mole\times 0.200L}=0.0549mole/L=0.0549M

Therefore, the molar concentration of sucrose in the tea is, 0.0549 M

7 0
3 years ago
Other questions:
  • Sarah and Maria mixed some iron filings with yellow sulfur powder. Both iron and sulfur are elements in the periodic table. The
    13·2 answers
  • Chemical equation for heat of formation of c25h52
    13·1 answer
  • Lord kelvin described the concept of absolute zero temperature and the laws relating the change in thermal energy during chemica
    12·1 answer
  • If I apply 0.108 kJ of energy in order to increase the temperature of a bar of gold from 30.0°C to 34.7°C, and the specific heat
    15·1 answer
  • Gaseous methane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 0.802 g of methane i
    5·1 answer
  • Explain the process of initiation and elongation.
    9·1 answer
  • PLEASE HELP ME DUE TOMORROW IT REALLY HELPS IF YOU HELP ME THANK YOU SO MUCH IS YOU DO HELP ME!!
    14·1 answer
  • Describes what occurs in facilitated diffusion?
    12·1 answer
  • How are phase changes related to kinetic energy? Justify your response in TWO OR MORE COMPLETE SENTENCES.
    14·2 answers
  • A chemist determines by measurements that moles of nitrogen gas participate in a chemical reaction. Calculate the mass of nitrog
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!