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
erastovalidia [21]
3 years ago
5

Why do we use moles when calculating empirical chemical formulas, but not the mass?

Chemistry
2 answers:
Arada [10]3 years ago
8 0

Answer:

because moles is the chemical unit*Avogadro's number, meaning it's the amount of atoms in the given unit.

Explanation:

MrMuchimi3 years ago
8 0
Because it’s the amount of atoms in the unit
You might be interested in
PLEASE ANSWER ASAP NEED ANSWER!!!!!!!!!!!!!! 75 POINTS
kakasveta [241]

Answer:

The answer to your question is A.

Pure substances can not be broken down into others, so they cannot be molecules

Explanation:

5 0
2 years ago
Read 2 more answers
CaO + H2O -> Ca(OH)2
yawa3891 [41]

The % yield of Ca(OH)₂ : 62.98%

<h3>Further eplanation </h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

CaO + H₂O ⇒ Ca(OH)₂

mass CaO= 4.2 g

mol CaO(MW=56,0774 g/mol) :

\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{4.2}{56,0774 g/mol}\\\\mol=0.075

mol Ca(OH)₂ based on mol CaO

mol ratio CaO : Ca(OH)₂,= 1 : 1, so mol Ca(OH)₂ = 0.075

mass Ca(OH)₂(MW=74,093 g/mol) ⇒ theoretical

\tt mass=mol\times MW\\\\mass=0.075\times 74,093 g/mol\\\\mass=5.557~g

% yield :

\tt =\dfrac{actual}{theoretical}\times 100\%\\\\=\dfrac{3.5}{5.557}\times 100\%\\\\=62.98\%

8 0
2 years ago
I need help with this for an assignment
arsen [322]
Answer:
hydrochloric acid reacts with sodium hydroxide to form sodium chloride (the salt) and water.

Explanation:
Sodium chloride is made up of Na+ cations from the base (NaOH) and CI-anions from the acid (HCI).

Hope this helped!
4 0
2 years ago
Please help me asap!
vesna_86 [32]

Answer:

bebe bebe bebe

Explanation:

5 0
3 years ago
What element is used in bright flashing advertising signs
Sergeu [11.5K]
The element used in advertising signs is neon.
4 0
3 years ago
Other questions:
  • Is it true or false that Science is a collection of facts that does not evolve. We have gained all the knowledge we can from sci
    8·1 answer
  • Propane, C3H8, consists of ________________ bonds and it can be expected to dissolve in hexane and to not dissolve in water.
    8·1 answer
  • What is the melting point of a solution in which 3.5 grams of sodium chloride is added to 230 mL of water?
    11·2 answers
  • The tarnish that forms on objects made of silver is solid silver sulphide. This can be removed by reacting it with aluminium met
    6·1 answer
  • Write the net ionic equation for the following molecular equation Mg (s) +Snso (aq) Mgso4 (aq) Sn(s) Use the lowest possible coe
    10·1 answer
  • How is energy transformed from one form to another? Give three examples of objects that have potential energy and kinetic energy
    8·1 answer
  • Urea spontaneous dissolves in water (to a high concentration). When urea dissolves in water, the solution cools before reaching
    5·1 answer
  • Express 749 000 000 in scientific notation,
    13·1 answer
  • Along a front, which air is always forced up?
    13·1 answer
  • Which of the following happens when an ionic bond is formed? (1 point)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!