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
Vikentia [17]
3 years ago
13

What gives the gem amethyst its purplish color?

Chemistry
1 answer:
Semenov [28]3 years ago
5 0
The question is asking us to determine what gives the Amethyst its purplish color. Amethyst colors range from light to dark purple. The most highly regarded are the transparent deep purple colors. Amethyst ( chemical formula: Si O2 ) is the purple variety of the mineral Quartz.The pure Quartz is often colorless. Amethyst gets its purplish color because of the presence of Iron ( Fe ) and other impurities in the gem. Answer: C. Iron.<span /><span />
You might be interested in
Explain how the cell works. Include the oxidation and reduction half-reactions in your explanation.
Mariana [72]
<span>Oxidation is the loss of electrons and corresponds to an increase in oxidation state. The reduction is the gain of electrons and corresponds to a decrease in oxidation state. Balancing redox reactions can be more complicated than balancing other types of reactions because both the mass and charge must be balanced. Redox reactions occurring in aqueous solutions can be balanced by using a special procedure called the half-reaction method of balancing. In this procedure, the overall equation is broken down into two half-reactions: one for oxidation and the other for reduction. The half-reactions are balanced individually and then added together so that the number of electrons generated in the oxidation half-reaction is the same as the number of electrons consumed in the reduction half-reaction.</span>
6 0
3 years ago
How many cu atoms are present in a piece of sterlingsilver jewelry weighing 33.24 g ? (sterling silver is a silver–copper alloy
emmasim [6.3K]

The mass of piece of sterling silver jewelry is 33.24 g. It contains 92.5% silver Ag by mass. Since, sterling silver is an alloy of Ag-Cu thus, percentage of Cu will be:

% Cu=100-92.5=7.5%

Thus, mass of copper will be:

m_{Cu}=\frac{7.5}{100}\times 33.24 g=2.493 g

Molar mass of Cu is 63.546 g/mol, thus, number of moles of Cu can be calculated as follows:

n=\frac{m}{M}

Here, m is mass and M is molar mass.

Putting the values,

n=\frac{2.493 g}{63.546 g/mol}=0.03923 mol

Now, in 1 mole of Cu there are 6.303\times 10^{23}atoms thus, in 0.03923 mol, number of Cu atoms will be:

0.03923 mol\times 6.303\times 10^{23}atoms=2.363\times 10^{22} atoms

Thus, number of atoms of Cu will be2.363\times 10^{22} atoms.


8 0
3 years ago
Why does knowing types of mixtures help you to identify a substance?
Reil [10]

Answer:

This is my own explanation:

Explanation:

It is important to know the mixtures you input together because you may determine the type of substance you produced from different elements and several combinations of matter. This assists in identifying your specific substance.

8 0
2 years ago
Scientists at a food manufacturing company compare the properties of substances for use in flavoring frozen yogurt. They prepare
Ludmilka [50]
I pick but I'm not sure about it though 1and3
7 0
3 years ago
Which of these has the highest h+ concentration? lemon juice, ph = 2.3 red wine, ph = 3.2 tomato juice, ph = 4.7 household ammon
BartSMP [9]
Lemon juice has the highest h+ concentration. The more acidic something is the more H+ it has.

ph = 1 is the most acidic
ph = 14 is the most basic (opposite of acidic... think of soap.)
5 0
3 years ago
Read 2 more answers
Other questions:
  • The System that Linnaeus classifies organisms by? A.genus and order B.order and species C.genus and species D.Kingdom and class
    9·2 answers
  • What volume of a 2.75 m solution of naoh is required to make 500.0 ml of a 1.27 m solution of naoh?
    11·2 answers
  • Which element has only two half filled orbitals in the 3D sub level
    9·2 answers
  • Please help solving number 48.
    10·1 answer
  • The following question appears on a quiz: "You fill a tank with gas at 60°C to 100 kPa and seal it. You decrease the temperature
    13·2 answers
  • 50 Points
    5·2 answers
  • 5. Which happens last in the process of photosynthesis?
    8·1 answer
  • How many moles of NO₂ would be required to produce 5.73 moles of HNO₃ in the presence of excess water in the following chemical
    10·1 answer
  • A) F-F
    11·1 answer
  • PLEASE SOMEONE HELP ME WITH THIS
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!