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
nadezda [96]
3 years ago
8

How many moles is 3.85 x 1025 atoms of gold?

Chemistry
2 answers:
IRINA_888 [86]3 years ago
7 0

Answer:

The answer is 5.73 moles Au

IrinaK [193]3 years ago
4 0

Answer:

64.17 Moles of Au

Explanation:

(atoms and particles are the same)

3.85 x 10 ^25 x (1 mol              

                         /6.02 x 10^23)

3.85 / 6 = .64166

.6416 x 10^2 = 64.166

If you round up the answer you will get 64.17

64.17  moles of Au

You might be interested in
If you could zoom enough to see atoms how would u find out if it is a compound element or a
scoundrel [369]
You would be able to tell because a compound has two or more different atoms bonded together. The element only has 1 type of atom. and the mixture has two or more different atoms together but not joined!!
4 0
3 years ago
An electrochemical cell has the following standard cell notation: Al(s) | Al3+(aq) || Mg2+(aq) | Mg(s)
Soloha48 [4]

Answer:

a. Al(s) ⇄ Al⁺³(aq) + 3e⁻ (oxidation)

Mg²⁺(aq) + 2e⁻ ⇄ Mg(s) (reduction)

b. ΔE° = + 0.715 V

c.  It's an electrolytic cell, because it's a nonspontaneous reaction.

d. 2Al(s) + 3Mg²⁺(aq) ⇄ 2Al⁺³(aq) + 3Mg(s)

Explanation:

a. By the notation given, first is represented the oxidation reaction and then the reduction reaction, so they are:

Al(s) ⇄ Al⁺³(aq) + 3e⁻ (oxidation)

Mg²⁺(aq) + 2e⁻ ⇄ Mg(s) (reduction)

b. The standard potential of the cell (ΔE°) is the reduction potential of the oxidation less the reduction potential of the reduction. The reduction potentials are:

Al(s) = -1.66 V

Mg(s) = -2.375 V

ΔE° = -1.66 - (-2.375)

ΔE° = + 0.715 V

c. It's an electrolytic cell.

A galvanic cell is spontaneous, so the cathode (reduction) has a higher E° than the cathode (oxidation). In this case, the oxidation reaction has a higher E°, so the reaction is nonspontaneous and it's necessary an external force to it happen, so it's an electrolytic cell.

d. 2Al(s) + 3Mg²⁺(aq) ⇄ 2Al⁺³(aq) + 3Mg(s)

The number of electrons must be the same, so the oxidation reaction is multiplied by 2, and the reduction reaction by 3.

5 0
3 years ago
Fe(CN)63- + Re → Fe(CN)64- + ReO4--. What is reduced?
givi [52]

Answer:

1. Fe is reduced

2. Mn is Oxidized

3. N is oxidized

Explanation:

<em>Check the image below:</em>

Reducing agent is an element or compound that loses an electron to an electron recipient in a redox chemical reaction. oxidizing agent is a substance that has the ability to oxidize other substances — in other words to accept their electrons.

6 0
3 years ago
How many grams of fluorine are needed to generate 7.65 moles Carbon Tetrafluoride
Delicious77 [7]

Answer:

36.3375 g

Explanation:

7 0
2 years ago
Chemical Name for Rb2S
Westkost [7]

Answer:

Rubidium Sulfide

Explanation:

The chemical name for Rb2S is Rubidium Sulfide

6 0
3 years ago
Read 2 more answers
Other questions:
  • You performed the experiment using air which we know is actually a mixture of several gases. would the results of this experimen
    6·1 answer
  • water is composed of two atoms of ____ and one of oxygen. question 2 options: carbon silicon nitrogen hydrogen
    12·1 answer
  • Is the following reaction exothermic or endothermic? 2P + 5Cl2 → 2PCl5 ΔH°= - 886 kJ​
    14·1 answer
  • Hector claims that a single sodium ion and a single oxygen ion do not bond together to form a stable binary ionic compound. Is h
    12·2 answers
  • Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in
    5·1 answer
  • When hot lava reaches seawater, the salts in the water react with the steam to form gaseous hydrochloride acid. You are given a
    11·1 answer
  • Which word best describes the upper mantle a) liquid, b) solid, c) plastic-like
    10·2 answers
  • What is the pattern of valence numbers on the periodic table?
    9·1 answer
  • Why are sound waves considered a type of mechanical energy?
    8·2 answers
  • A gas at 300 k and 4.0 atm is moved to a new location with a temperature of 250 k. the volume changes from 5.5 l to 2.0 l. what
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!