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
maksim [4K]
3 years ago
10

A jeweler has five rings, each weighing g, made of an alloy of silver and gold. She decides to melt down the rings and add enoug

h silver to reduce the gold content to . How much silver should she add
Chemistry
1 answer:
Kryger [21]3 years ago
5 0

Complete question :

A jeweler has five rings, each weighing 18 g, made of an alloy of 10% silver and 90% gold. She decides to melt down the rings and add enough silver to reduce the gold content to 75%. How much silver should she add?

Answer:

Kindly check explanation

Explanation:

Given the following :

Weight of each alloy = 18g

Initial % of Silver = 10% = 0.1

Initial % of Gold = 90% = 0.9

New % of gold = 75% = 0.75

Hence, new % of silver will be (1 - 0.75) = 0.25

Let the amount of silver to be added = s

Hence,

Initial gold content = final gold content + added silver

18 * 0.9 = 0.75(18 + s)

16.2 = 13.5 + 0.75s

16. 2 = 13.5 + 0.75s

16.2 - 13.5 = 0.75s

2.7 = 0.75s

s = 2.7 / 0.75

s = 3.6

S = 3.6

Hence the amount of silver needed per ring in other to reduce the gold content = 3.6g

Total for the 5 rings = (3.6 * 5) = 18g

You might be interested in
The element Y has 13 electrons. What is the electronic configuration of
enyata [817]

Answer:

0,2,8,3

Explanation:

k shell takes 2,L shell takes 8 and M shell takes the remaining which is 3

5 0
2 years ago
Question 4 (1 point)
Rainbow [258]

а о

Explanation:

 The given cation:

           (Rf₂Al₂F₃)³⁺

The oxidation number gives the extent to which a specie is oxidized in a reaction.

This number is assigned based on some rules:

  • Elements in combined state whose atoms combines with themselves have an oxidation number of zero.
  • The charge carried on simple ions gives their oxidation number.
  • Algebraic sum of all the oxidation numbers of atoms in neutral compound is zero. In an ion with more than one kind of atom, the charge on it is the oxidation number.

for the specie given;

Known:

  oxidation number of Al = +3

                                      F = -1

                          charge = +3

    let the oxidation number of Rf = k

        2k + 2(3) + 3(-1) = +3

          2k + 6 - 3 = 3

            2k = 0

              k = 0

The oxidation state of rutherfodium is 0

learn more:

Oxidation state brainly.com/question/10017129

#learnwithBrainly

8 0
3 years ago
What happens to the electrons in an ionic bond?
Anton [14]

Answer:

In an ionic bonds, the metal loses electrons to become a positively charged cation, In which the nonmetal accepts those electrons to become a negatively charged anion.

Explanation:

3 0
3 years ago
Read 2 more answers
A student spends 4.5 hours studying for a test. How much time is this equivalent to in seconds
ivanzaharov [21]
The answer is: b)16,200 seconds :)
7 0
3 years ago
Who was given name black hole​
marin [14]

Answer:

John Archibald Wheeler

3 0
3 years ago
Other questions:
  • What is one way that cactus and camel are similar
    6·2 answers
  • A solution of pH 3 was mixed with a solution of pH 9. What is the final pH could be ?
    6·1 answer
  • A pain-relieving pill has a mass of 0.005 g. Express the pill’s mass in grams using scientific notation or in milligrams.
    7·2 answers
  • PLEASE HELP NOW! i need help
    7·2 answers
  • Fill missing reagents.
    10·1 answer
  • I need this answer before 7 can anyone help me please!
    11·2 answers
  • The beaks of finches found on various Galapagos Islands
    7·2 answers
  • Each particle of water in an ocean wave moves in a circle true or false
    13·1 answer
  • Help pls i give 20 points
    7·1 answer
  • When a strong acid such as hcl is added to the carbonic acid buffer system, _________
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!