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
xz_007 [3.2K]
2 years ago
6

A chemist obtains a sample of

Chemistry
1 answer:
djverab [1.8K]2 years ago
7 0

The number of formula units of Na₂SO₄ present in the sample is 3.01×10²³ units

<h3>Avogadro's hypothesis </h3>

From Avogadro's hypothesis,

1 mole of Na₂SO₄ = 6.02×10²³ units

But

1 mole of Na₂SO₄ = (23×2) + 32 + (16×4) = 142 g

Thus,

142 g of Na₂SO₄ = 6.02×10²³ units

<h3>How to determine the units in 71 g of sample </h3>

142 g of Na₂SO₄ = 6.02×10²³ units

Therefore,

71 g of Na₂SO₄ = (71 × 6.02×10²³) / 142

71 g of Na₂SO₄ = 3.01×10²³ units

Thus, 3.01×10²³ units of Na₂SO₄ is present in the sample

Learn more about Avogadro's number:

brainly.com/question/26141731

You might be interested in
Question 1 of 10<br> What happens when a solid becomes a liquid?
Natalija [7]

Answer:it dissolves and evaporates

Explanation:

6 0
2 years ago
Read 2 more answers
________ are solutions containing ions that react with acids or bases to minimize their effects.
myrzilka [38]
<span>ions are solutions containing ions that react with acids or bases to minimize their effects. </span>
6 0
3 years ago
A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed inside the calorimeter. When equilibrium ha
Tju [1.3M]
When equilibrium has been reached so, according to this formula we can get the specific heat of the unknown metal and from it, we can define the metal as each metal has its specific heat:

Mw*Cw*ΔTw = Mm*Cm*ΔTm

when 
Mw → mass of water
Cw → specific heat of water
ΔTw → difference in temperature for water 

Mm→ mass of metal
Cw→ specific heat of the metal
ΔTm → difference in temperature for metal

by substitution:

100g * 4.18 * (40-39.8) = 8.23 g * Cm * (50-40)

∴ Cm = 83.6 / 82.3 = 1.02 J/g.°C

when the Cm of the Magnesium ∴ the unknown metal is Mg
6 0
3 years ago
Four cars travel at the same speed down a road. Their mass and kinetic energy are shown in the graph,
Alex777 [14]

Answer:B

Explanation:

3 0
2 years ago
A solution has a [OH-] of 1 × 10-9. What is the pOH of this solution?
zhannawk [14.2K]
POH = - log [ OH⁻ ]

pOH = - log [ 1 x 10⁻⁹ ] 

pOH = 9

Answer C

hope this helps!
3 0
3 years ago
Other questions:
  • Why nitro group is called an ambident group?​
    13·2 answers
  • Convert 60 grams of nitrogen gas (N2) to liters.
    6·1 answer
  • An intense emission line for a new element is observed at a wavelength of 675 nm. What is the energy of a single photon of this
    14·1 answer
  • I really need help please someone help me?!.<br><br> Those are all the questions.
    13·2 answers
  • Is there a relationship between CO2 levels in average global temperatures
    8·1 answer
  • What is the formula mass of
    9·1 answer
  • The net ionic equation for the reaction of aluminum sulfate and sodium hydroxide
    14·1 answer
  • 10. When a substance is analyzed using an electron microscope, it is found
    13·1 answer
  • Which metal gets coated during electroplating? A. The metal with electrons flowing from it
    14·1 answer
  • What type of elements form ionic bonds with metals
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!