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
Nonamiya [84]
2 years ago
8

True or False: Both molecules and compounds are pure substances.

Chemistry
2 answers:
Solnce55 [7]2 years ago
4 0

Answer:

False

Explanation:

Hope this helps!

WARRIOR [948]2 years ago
3 0

Answer:

True

Explanation:

It's because both compounds and elements are considered pure substances and a molecules is considered an element.

You might be interested in
A silicon wafer with dimensions 15.00 cm x 15.00 cm x 0.0400 cm
Oxana [17]

The silicon wafer contains 20.96 g of silicon.

The mole of a substance is related to its mass and molar mass by the following equation:

<h3>Mole = mass / molar mass ....... (1)</h3>

Making mass the subject of the above equation, we have

<h3>Mass = mole × molar mass ..... (2)</h3>

With the above formula (i.e equation 2), we can obtain the mass of silicon in the wafer as follow:

Mole silicon = 0.746 mole

Molar mass of silicon = 28.09 g/mol

<h3>Mass of silicon =? </h3>

Mass = mole × molar mass

Mass = 0.746 × 28.09

<h3>Mass of silicon = 20.96 g</h3>

Therefore, the mass of silicon in the wafer is 20.96 g

Learn more: brainly.com/question/24639749

3 0
2 years ago
Human blood has a pH of 7.4. A urine test
Ostrovityanka [42]

Answer:

the difference between blood and urine is it is red, it is yellow, it has a ph of 7.4 and it has a ph of 4.6

4 0
3 years ago
Catalina received her bank statement showing a savings account balance of $1,056.33. Not shown on the statement were a deposit o
Dafna1 [17]
$724.73 this would be the answer because if you subtract 320.50 and 86.10 from the 1056.33 then add 75 you get 724.73
6 0
3 years ago
When coal or oil are burned, some part of it is completely combusted, forming co2; another part is partially combusted, forming
Arturiano [62]
These are main components of Industrial Smog. Smog is air pollutant. Main sources of Smog are 1) Coal, 2) Transportation Emission, 3) Natural Causes. Those areas are mainly effected which are located in Industrial Zones and those which has high traffic density. Cities like Delhi, Beijing, London, Maxico City, Log Angeles, Tehran e.t.c are reported to be highly effected by smog. Among these polutants, CO₂ is the main source of Global Warming, CO has adverse effects on human health as it has 200 times more potency to bind with Hemoglobin compared to Oxygen, SO₂ when present in air reacts with water producing acid rain e.t.c.
6 0
3 years ago
10/24/14
vlabodo [156]

Answer:

d = Hydrogen and oxygen are being formed.

Explanation:

When current is passed through the water electrolysis take place.

Water is splitted into hydrogen and oxygen gas. Because of this formation bubbles are formed.

At cathode:

2H₂O + 2e⁻  → H₂ + 2OH⁻

Cathode is negatively charged and reduction take place on it.

At anode:

4OH⁻ → O₂ + 2H₂O + 4e⁻

Anode is positively charged and oxidation take place on it.

The over all reaction can be written as:

Chemical equation:

2H₂O  (electricity) →  2H₂  +  O₂

3 0
3 years ago
Read 2 more answers
Other questions:
  • What are the physical states in which water can exist in the atmosphere? Give an example of how we can sense each state.
    15·1 answer
  • A calorimeter contains 124 g of water at 26.6°C. A block of metal with a mass of 26 g is heated to 95.8°C and then placed in the
    5·1 answer
  • Im literally failing some classes can some one help me with them
    7·2 answers
  • How does temperature, pressure and surface area affect the dissolving process
    14·2 answers
  • Which is the strongest acid listed in the table
    6·1 answer
  • 1. Household bleach (NaOCl) is really a solution of sodium hypochlorite in water. It is made by reacting chlorine gas and sodium
    9·1 answer
  • Elements in this family have 1 valence electron?
    9·1 answer
  • How many moles are in 5.00 x 1024 atoms of N. Watch your significant figures.
    5·1 answer
  • Suppose that you measured out 3.50g of Na2SO4. how many moles would you have? (show work)​
    13·1 answer
  • A piece of metal with a mass of 23.2 g at 120.1oC is placed in a styrofoam cup containing 35.0 g of water at 22.2oC. Once the sy
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!