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
kati45 [8]
3 years ago
12

Mercury can be obtained by reacting mercury(I) sulfide with calcium oxide. How many grams of calcium oxide are needed to produce

55.0 g of Hg? Note: 4 Hg2S + 4 CaO -> 8 Hg + 3 CaS + 1 CaSO4
Chemistry
1 answer:
OLga [1]3 years ago
4 0
First, 55 g of Hg is 3.65 moles because one mole of Hg has a molar mass of 200.59

Then, the mole ratio of Hg to CaO is 8:4 or 2:1. SO we divide 3.65 by 2 to get 1.82 moles of CaO

This is the same as 102.06 grams because one mole of CaO has a molar mass of 56.0774

Hope this helps!
You might be interested in
Can somebody please help me ! :(
Helen [10]

Answer:

325

Explanation:

velocity = 3250 Hz x 0.1 m

5 0
3 years ago
Read 2 more answers
A runner competed in a 5-mile run. How many yards did she run?
vfiekz [6]
5 miles are equivalent to 8,800 yards

so b. is the correct answer. plz like and hope it helped
3 0
3 years ago
The muscles on the run in transform chemical potential energy into_____
LekaFEV [45]

Mechanical Energy

Mechanism energy is the energy associated with the position and motion of an object. Therefore it is also the summation of the kinetic and potential energies of the object.

Explanation:

Mechanism energy is the energy associated with the position and motion of an object. Therefore it is also the summation of the kinetic and potential energies of the object.

In the muscles, to have movement, the chemical bonds in ATP is broken to enable the sliding action of the myosin and actin fibres of a sarcomere (the basic unit of muscle). This sliding action is responsible for contraction of muscle.  The coordinated contractions and relaxations of sarcomeres on muscles result in movement which translates to mechanical energy.

This process is never 100% efficient with some energy lost as heat energy.

Learn More:

For more on energy transformation check out;

brainly.com/question/12764386

brainly.com/question/12841537

#LearnWithBrainly

5 0
3 years ago
In a constant‑pressure calorimeter, 60.0 mL of 0.300 M Ba(OH)2 was added to 60.0 mL of 0.600 M HCl. The reaction caused the temp
Zepler [3.9K]

Answer:

ΔH = 57.04 Kj/mole H₂O

Explanation:

60ml(0.300M Ba(OH)₂(aq) + 60ml(0.600M HCl(aq)

=> 0.06(0.3)mole Ba(OH)₂(aq) + 0.60(0.6)mole HCl(aq)

=> 0.018mole Ba(OH)₂(aq) + 0.036mole HCl(aq)

=> 100% conversion of reactants => 0.018mole BaCl₂(aq) + 0.036mole H₂O(l) + Heat

ΔH = mcΔT/moles H₂O <==> Heat Transfer / mole H₂O

=(120g)(4.0184j/g°C)(27.74°C - 23.65°C)/(0.036mole H₂O)

ΔH = 57,042 j/mole H₂O = 57.04 Kj/mole H₂O

3 0
3 years ago
The emission spectrums are known for the elements below. Line spectra for boron, lithium, hydrogen, helium, potassium and unknow
Montano1993 [528]

Answer:

E

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Why does the Zr4+ ion exist?
    11·2 answers
  • What is the luster of aluminum
    10·1 answer
  • In the word equation, sodium oxide water sodium hydroxide, the formula for sodium hydroxide is represented by
    12·1 answer
  • Jon is completing a lab for his chemistry class, and Katarina is finishing a lab for her geology class. They investigated differ
    12·1 answer
  • 50 mL of a mixture consisting of 0.019 M cerium (IV) and 2.7 M H2SO4, or sulfuric acid. Begin by preparing 100 mL of 2.7 M H2SO4
    7·1 answer
  • Why does chromium have a 3 charge? why is chromium (vi) oxide [cro3} not chromium 3 oxide?
    12·1 answer
  • What is a molecular formula?
    15·1 answer
  • What volume of 8.00 M HCI is needed to make 206 mL of 4.50 M HCI
    15·1 answer
  • H3PO4 + Ca(OH)2 → Ca(H2PO4)2 + H2O
    13·1 answer
  • Anaerobic Cellular Respiration
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!