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
ss7ja [257]
3 years ago
13

A student heats 2.796g of zinc powder with 2.414g of sulphur.He reported that he obtained 4.169g of zinc sulfide and recover 1.0

41g of unreacted sulfur.
Show by calculation whether or not his results obey the law of conversation of mass
Chemistry
1 answer:
Sati [7]3 years ago
5 0

Answer:

The mass of reactants and products are equal hence the reaction obeys law of conservation of mass

Explanation:

The law of mass conservation states that for a closed system to all transfer of mass, the mass of system must remain constant over time. This means for a chemical reaction, the mass of reactants must equal the mass of products.

if 2.796g of Zn reacts with 2.414g of sulphur to produce 4.169g of ZnS ad 1.041g of unreacted sulphur, then it means that accorfing to the law of mass conservation, the mass of reactants (zinc and sulphur), must be equal to mass of products (zinc sulfide and unreacted sulphur)

Mass of reactants = 2.796g + 2.414g =5.21g

Mass of products = 4.169g + 1.041g=5.21g

You might be interested in
During resperation______.
Vikki [24]

D. oxygen is used to break down glucose into energy

Explanation:

During respiration, oxygen is used to break down glucose into energy:

          C₆H₁₂O₆  + O₂   →  CO₂   +  H₂O  + energy

In the process of respiration, oxygen gas combines with glucose to liberate energy.

  • Respiratory system in the body is responsible for the metabolic break down of food to provide energy for the working of the human body.
  • Chemical energy in glucose is broken down to produce other forms of energy most especially heat.
  • The by product is usually carbon dioxide and water vapor.

Learn more:

Respiration brainly.com/question/3447259

#learnwithBrainly

4 0
3 years ago
Alex cut a pizza into 8 equal slices. He removed 2 of the slices of pizza. What is the measure of the angle made by the missing
Firlakuza [10]

Answer: 90 degrees.

Explanation:

4 0
3 years ago
Uranium has 146 neutrons; therefore its mass number is which of the following?
Vilka [71]
Its <span>234or238  hope dis helped</span>
5 0
3 years ago
Read 2 more answers
What is physical weathering? (1 point)
steposvetlana [31]

Answer:

well physical weathering is the process of a element or acts of water rock or other items that take its toll on items

Explanation:

so i would,WITH CONFIDENCE         C.

5 0
3 years ago
Read 2 more answers
40 g of CaCO3 is how many moles of CaCO3?<br> 10 moles<br> 0.4 moles<br> 40 moles<br> 100 moles
AleksandrR [38]

Answer:

0.4 moles

Explanation:

To convert between moles and grams you need the molar mass of the compound. The molar mass of of CaCO3 is 100.09g/mol. You use that as the unit converter.

40gCaCO3* 1mol CaCO3/100.09gCaCO3 = 0.399640 mol CaCO3

This rounds to 0.4 moles CaCO3

8 0
3 years ago
Other questions:
  • A compound of low solubility
    10·1 answer
  • What is the difference between an atom in the ground state and an atom in an excited state? A. The atom in the ground state has
    11·2 answers
  • The decomposition of dinitrogen tetraoxide into nitrogen gas and oxygen gas is shown by which balanced chemical equation?
    7·1 answer
  • Do all liquids evaporate at the same rate?
    14·1 answer
  • The spread of which pathogens is most likely prevented by vaccines?
    8·1 answer
  • When was that one moment when you laughed the hardest
    11·2 answers
  • Uranium, an important component of both nuclear weapons and nuclearreactors, has two major isotopes, U-238, which has a half-lif
    10·1 answer
  • Within atoms, what kind of energy<br> is stored?
    8·1 answer
  • PLEASE HELP!!!<br> How many km/hr are there in 6.01 x 10^6 yd/wk?
    13·1 answer
  • A chemist measures the amount of chlorine gas produced during an experiment. she finds that 8.61 g of chlorine gas is produced.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!