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
sweet-ann [11.9K]
3 years ago
10

Sapphires and Rubies are composed of ? A. oliveB. turquoiseC. corundumD. quartz​

Chemistry
2 answers:
Aleonysh [2.5K]3 years ago
8 0

Answer:

c

Explanation:

it is corundum now please follow me

MakcuM [25]3 years ago
6 0

Answer: corundum

Explanation: Both are made of alumina and oxygen, but they just differ in color. When a corundum is red, it is classified as a ruby, and when it’s blue, it is called a sapphire.

You might be interested in
Part A Find ΔS∘ for the reaction between nitrogen gas and hydrogen gas to form ammonia: 12N2(g)+32H2(g)→NH3(g) Express your answ
inessss [21]

Answer:

\Delta S^{0} for the given reaction is -99.4 J/K

Explanation:

Balanced reaction: \frac{1}{2}N_{2}(g)+\frac{3}{2}H_{2}(g)\rightarrow NH_{3}(g)

\Delta S^{0}=[1mol\times S^{0}(NH_{3})_{g}]-[\frac{1}{2}mol\times S^{0}(N_{2})_{g}]-[\frac{3}{2}mol\times S^{0}(H_{2})_{g}]

where S^{0} represents standard entropy.

Plug in all the standard entropy values from available literature in the above equation:

\Delta S^{0}=[1mol\times 192.45\frac{J}{mol.K}]-[\frac{1}{2}mol\times 191.61\frac{J}{mol.K}]-[\frac{3}{2}mol\times 130.684\frac{J}{mol.K}]=-99.4J/K

So, \Delta S^{0} for the given reaction is -99.4 J/K

7 0
3 years ago
Select multiple choices.<br><br> Thank you
AnnZ [28]
D, systems of writing
4 0
3 years ago
Which of these is NOT a cause of the heat inside Earth?
Andrei [34K]

Answer:

Bombardment by asteroids

Explanation:

All of the other ones explain themselves

6 0
3 years ago
Read 2 more answers
What happens when chemical bonds break and new bonds form
zheka24 [161]

Answer:

Chemical reactions make and break the chemical bonds between molecules, resulting in new materials as the products of the chemical reaction.

Explanation:

Breaking chemical bonds absorbs energy, while making new bonds releases energy, with the overall chemical reaction being endothermic or exothermic.

5 0
3 years ago
Science there’s a picture
melomori [17]

Answer:

D)

Explanation:

seems like the most logical option out of all listed.

4 0
2 years ago
Other questions:
  • What method would best allow these three different scientists to demonstrate their concepts?
    7·1 answer
  • over a 12.3 minuete period 5.13 E-3 moles of F2 gas effuses from a contaier. How many moles of CH4 gas could effuse from from th
    6·1 answer
  • Calculate the grams of so2 gas present at stp in a 5.9 l container.
    7·1 answer
  • If the pressure of a gas is 2.42 atm, what is its pressure in kPa?
    5·2 answers
  • How would an apple, potato, and onion all taste the same?
    9·1 answer
  • This is the balanced chemical equation for a reaction
    12·2 answers
  • Glucose is one kind of sugar that we get from rice. How many elements does it contain? Use its chemical formula, C6H12O6
    14·1 answer
  • 9) All elements can be sorted into 3 simple groups:
    12·2 answers
  • Which shows the weight of an atom?
    14·1 answer
  • Question 1: Is change in atmospheric CO₂ levels likely to impact marine life?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!