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
attashe74 [19]
3 years ago
10

The chemical formula for rubies is AI2O3 list the elements that combine to form a ruby and the number of atoms of each element i

n a single molecule of the gem ?
Chemistry
1 answer:
max2010maxim [7]3 years ago
5 0
Since the chemical formula is Al2O3, it means in a single molecule there are 2 atoms Al and 3 atoms O. O means oxygen and Al means alluminium, so there are 2 atoms alluminium and 3 atoms oxygen.
You might be interested in
How does the Theory of Plate Tectonics explain the location of same fossils at Points A and B?
Artemon [7]
Yellow because Pangea all the continents were together
5 0
3 years ago
An electrochemical cell is composed of pure nickel and pure iron electrodes immersed in solutions of their divalent ions at room
Andrej [43]

Answer:

0.758 V.

Explanation:

Hello!

In this case, case when we include the effect of concentration on an electrochemical cell, we need to consider the Nerst equation at 25 °C:

E=E\°-\frac{0.0591}{n} log(Q)

Whereas n stands for the number of moles of transferred electrons and Q the reaction quotient relating the concentration of the oxidized species over the concentration of the reduced species. In such a way, we can write the undergoing half-reactions in the cell, considering the iron's one is reversed because it has the most positive standard potential so it tends to reduction:

Fe^{2+}+2e^-\rightarrow Fe^0\ \ \ E\°=0.440V\\\\Ni^0\rightarrow Ni^{2+}+2e^-\ \ \ E\°=-0.250V

It means that the concentration of the oxidized species is 0.002 M (that of nickel), that of the reduced species is 0.40 M and there are two moles of transferred electrons; therefore, the generated potential turns out:

E=(0.440V+0.250V)-\frac{0.0591}{2} log(\frac{0.002M}{0.40M} )\\\\E=0.758V

Beat regards!

8 0
3 years ago
n the reaction Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq), how many moles of hydrogen gas will be produced from 75.0 milliliters of
Xelga [282]
0.075 L * 1.0 M = 0.075 mol HCl
H2 is half of HCl by the coefficients divide 0.075 by 2 and get 0.0375 mol H2 gas
8 0
3 years ago
Gimme the sandmeyer's reaction!!!​
iren2701 [21]

Answer:

The Sandmeyer reaction is a chemical reaction used to synthesize aryl halides from aryl diazonium salts using copper salts as reagents or catalysts. It is an example of a radical-nucleophilic aromatic substitution.

4 0
2 years ago
Which of the following statements about enzymes is true?. a. Enzymes are able to heat up molecules so that they can react.. b. E
taurus [48]
The answer is C as enzymes are biological catalysts that act on a substrate such as starch if the enzyme were amylase

hope that helps 
5 0
3 years ago
Read 2 more answers
Other questions:
  • What is adaptive radiation?
    5·2 answers
  • What is the definition for exothermic and endothermic energy?
    5·1 answer
  • Draw the addition product formed when one equivalent of hcl reacts with the following diene.
    13·1 answer
  • A reaction requires 15.0 g of ammonium chloride. What volumeof a
    6·1 answer
  • During the rock cycle, rocks get broken apart by weathering, carried along by erosion, and eventually deposited in a body of wat
    8·2 answers
  • How many moles of NaOH are present in 27.5 mL of 0.270 M NaOH?
    15·1 answer
  • 1What is one major difference between fossil fuels and biofuels?
    10·1 answer
  • Energy 1:Question 3
    13·1 answer
  • What is conductivity? How is it measured?
    9·2 answers
  • A 10.0-g sample of magnesium reacts with oxygen to form 16.6 g of magnesium oxide. How many grams of oxygen reacted?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!