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
Klio2033 [76]
3 years ago
6

How many moles of zinc are in 4.70 kg of zinc?

Chemistry
2 answers:
Semmy [17]3 years ago
7 0

Answer:

There are 71.89 moles of Zinc in 4.70kg of Zinc

Explanation:

Information given;

- Calculate Number of moles

- Mass of Zinc

Before proceeding, it is important to know the definition of what molar mass is. Molar mass is defined as the mass in grams of one mole of a substance.

So it means one mole of Zinc would contain the molar mass in g.

The molar mass of Zinc is given as; 65.38g/mol

How many moles then in 4.70kg?

Upon converting to g, we have 4.7 *1000 = 4700g

1 mol = 65.38g

x mol = 4700g

Cross multiplication yields;

x = (1* 4700) / 65.38

x = 71.89 moles

It means that there are 71.89 moles of Zinc in 4.70kg of Zinc

faust18 [17]3 years ago
6 0
First we convert kg to g
1kg =1000g
4.70=x(gram)
4.70×1000÷1=4700g
now:
number of moles=mass÷molarmass
number of moles=4700÷65.4
number of moles=71.86moles.
You might be interested in
Joshua wants to create something to put between a hot pot and a table, so he doesn't burn the table. He
hodyreva [135]
Copper is a good conductor of heat. This means that if you heat one end of a piece of copper, the other end will quickly reach the same temperature. Most metals are pretty good conductors; however, apart from silver, copper is the best.

Aluminum is an excellent heat and electricity conductor and in relation to its weight is almost twice as good a conductor as copper.

Glass is a very poor heat conductor. It has one of the lowest possible heat conduction a solid (without air trapped in it) can possibly have, this is mostly due to its lack of ordered crystal structure. Since it's an insulator, the electronic contribution to the thermal conductivity is very small.

Metals and stone are considered good conductors since they can speedily transfer heat, whereas materials like wood, paper, air, and cloth are poor conductors of heat. ... These include copper (92), iron (11), water (0.12), and wood (0.03).

Wood and Glass do not conduct heat well, aluminum is the best for him to choose because

aluminum conducted heat the fastest at an average of 14 seconds. ... Aluminum has the ability to absorb heat faster than copper, and when removed from the heat source, will cool faster because it is less dense than copper

7 0
3 years ago
sodium-25 was to be used in an experiment but it took 3.0 minutes to get the sodium from the reactor to the laboratory if 5.0 mg
Hoochie [10]
3 half lives later... 5/2 = 2.5mg, then 2.5/2 = 1.25 mg, then 1.25/2 = .625 mg left
7 0
3 years ago
What are some differences between a family tree and evolutionary
Ber [7]

Answer:

El árbol filogenético es la relación de parentesco que existen entre diferentes especies, de manera general mientras que el árbol genealógico es la relación de parentesco entre los individuos de una sola especie.

Explanation:

El árbol filogenético es la relación de parentesco que existen entre diferentes especies, de manera general mientras que el árbol genealógico es la relación de parentesco entre los individuos de una sola especie.

8 0
3 years ago
4Fe+3O2<br><br> I really have no idea how to do this.. HELP
Jlenok [28]
Reorder 4Fe and 3O2.
3O2 + 4Fe
3 0
3 years ago
Propose a plausible mechanism for the following transformation: For the mechanism, draw the curved arrows as needed. Include lon
monitta

Answer:

The question is incomplete. The mechanism is not included in your question. The attached file contains the mechanism and the proposed mechanism.

Explanation:

See the attached file for the structure.

5 0
3 years ago
Other questions:
  • Litmus paper can be used to determine the _______ of a substance. A. relative volume B. relative pH C. temperature D. chemical f
    12·1 answer
  • Is this any better??
    12·1 answer
  • The atoms of compounds are _____________ combined in some way. Often times they come together to form groups of atoms called mol
    13·2 answers
  • Salt is the product formed by a reaction in which _______ atoms of an acid are replaced by the atoms
    15·1 answer
  • Which of the following substance is usted up during photosynthesis
    14·1 answer
  • A(n)_________contains only one type of atom, whereas a(n)_________ is composed of two or more different elements bonded together
    13·1 answer
  • Once at the top. the wax molecules begin to___________ energy to the glass then the surrounding air.
    5·1 answer
  • Which term is defined as the phase change from gas to solid?.
    5·1 answer
  • Choose a federal law from the list below.
    15·1 answer
  • Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!