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
mel-nik [20]
3 years ago
15

A piece of gold jewelry weighs 11.54 g and has a volume of 0.675 cm3. The jewelry contains only gold (density = 19.3 g/cm3) and

silver (density = 10.5 g/cm3). Assuming that the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold in the jewelry.
Chemistry
1 answer:
lbvjy [14]3 years ago
4 0

Answer:

Percentage of gold = 84.6%

Explanation:

Suppose the jewelry has x g of gold and y g of silver

The mass of both is the total mass of the jewelry then:

x + y = 11.54

And as the problem says the total volume is the sum of both volumes.

volume = mass / density

\frac{x}{19.3} + \frac{y}{10.5} = 0.675

Solving the system you get:

x = 9.764 g

y = 1.776 g

The percentage of gold in the jewelry is:

X_{gold} = \frac{9.764}{11.54} * 100 = 84.6\%

You might be interested in
Which list includes three types of chemical reactions?
Sidana [21]
Answer=3

<span>Decomposition, double replacement, and synthesis are 3 types of chemical reactions.</span>
7 0
3 years ago
Read 2 more answers
One example of an ionic compound is<br><br> F2 <br> CO2<br> HBr<br> MgCL2
allochka39001 [22]
MgCl2 because it is the only option in which a metal appears with a nonmetal. In this case, the metal transfers electrons to the nonmental because the metal has a lower ionization energy.
7 0
3 years ago
Read 2 more answers
During the process of condensation, water vapor:____________.
monitta

Answer: (2) releases 2260 J/g of heat energy

Explanation:

Latent heat of vaporization is the amount of heat required to convert 1 mole of liquid to gas at atmospheric pressure.

Latent heat of condensation is energy released when 1 mole of  vapor condenses to form liquid droplets.

The temperature does not change during this process, so heat released goes into changing the state of the substance, thus it is called latent which means hidden. The energy released in this process is same in magnitude as latent heat of vaporization. The heat of condensation of water vapour is about 2,260 J/g.

7 0
3 years ago
Name a lustrous non- metal ?​
kogti [31]

Answer:

it is iodine it seems very right

5 0
3 years ago
Read 2 more answers
I need help on this question
uranmaximum [27]

Answer:

When a front passes over an area, it means a change in the weather. Many fronts cause weather events such as rain, thunderstorms, gusty winds, and tornadoes. At a cold front, there may be dramatic thunderstorms. At a warm front, there may be low stratus clouds. Usually, the skies clear once the front has passed.

Explanation:

Plz make me brainliest :)

Have a nice day

6 0
3 years ago
Read 2 more answers
Other questions:
  • *HELP*
    12·1 answer
  • Consider the following balanced equation: SiO2(s)+3C(s)→SiC(s)+2CO(g) Complete the following table showing the appropriate numbe
    8·2 answers
  • Place the following in order of increasing IE1
    6·1 answer
  • A force of 30 N is applied to a screwdriver to pry the lid off of a can of paint. The screwdriver applies 75 N of force to the l
    11·1 answer
  • How many moles of solid naf would have to be added to 1.0 l of 2.39 m hf?
    9·1 answer
  • What is the molar mass of Sr(OH)2
    8·2 answers
  • There are some cells that do not have DNA. <br> O True<br> O false
    5·2 answers
  • For a concave mirror, incident light beams through C will reflect:
    8·1 answer
  • Which among the following can be attracted by a magnet, why?<br> an iron-<br> a piece of paper
    9·2 answers
  • At what point on the roller coaster do the riders have the greatest amount of potential energy?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!