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
Alex777 [14]
3 years ago
8

In which group of the Periodic Table do most of the elements exhibit both positive and negative oxidation states?

Chemistry
1 answer:
Shtirlitz [24]3 years ago
4 0
C i think but you should pick it anyway
You might be interested in
NUMBERS 6-8 URGENT PLEASE
kodGreya [7K]

Answer:

See explanation

Explanation:

9g of water contains : 9g/18 g/mol = 0.5 mole of water

1) 2 moles of hydrogen yields 2 moles of water

x moles of hydrogen yields 0.5 moles of water

x= 2 × 0.5/2 = 0.5 moles of hydrogen

Mass of hydrogen = 0.5 moles × 2 = 1 g of hydrogen

2) Number of moles of Al(OH)3 = 468 g/ 78 g/mol = 6 moles

2 moles of Al(OH)3 yields 3 moles of H2O

6 moles of Al(OH)3 yields 6 × 3/2 = 9 moles of H20

Mass of water =9 moles × 18 g/mol = 162 g of water

3) There are 13 oxygen atoms in the compound.

Mass of each oxygen atom = 16 g

Total mass of oxygen atoms = 13 × 16 = 208 g

5 0
3 years ago
Compute diffusion coefficients for the interdiffusion of carbon in both (a) α-iron (BCC) and (b) γ-iron (FCC) at 800.˚C. Assume
Ne4ueva [31]

Answer:

a)1.404 E-10 m^2/s

b)1.438 E-12 m^2/s

Explanation:

Diffusion Coefficients can be calculated at different temperatures taking into account the energy of the diffusive process, remember that this process takes place in the interstices of the solid, and gets with higher temperatures due to the higher kinetic energy of the particles.

D=D_{o} *exp(-Q/RT)

a) For α-iron (BCC)

D=1.10*10^{-6} m^{2}/s *exp(-80.0kJ/mol/8.314*10^{-3}kJ/mol*k*1073.15K)= 1.404*10^{-10} m^{2}/s

b) For γ-iron (FCC)

D=2.30*10^{-5} m^{2}/s *exp(-148.0kJ/mol/8.314*10^{-3}kJ/mol*k*1073.15K)= 1.438*10^{-12} m^{2}/s

5 0
3 years ago
Is relative dating an effective way to determine the age of rocks?
JulsSmile [24]

Answer: Read Explanation

Explanation: Index fossils are useful because they tell the relative ages of the rock layers in which they occur. Geologists use particular types of organisms, such as trilobites, as index fossils.

7 0
2 years ago
Read 2 more answers
2 The change in the velocity of an object is defined as its​
ollegr [7]

Answer:

Acceleration is the rate of change in velocity

3 0
2 years ago
Read 2 more answers
Which of the following best describes the impact of glaciers upon the surface of the earth?
Ahat [919]

Answer:

D. All of the above

Explanation:

Because all of these have something to do with how glaciers are affecting the planet.

6 0
3 years ago
Other questions:
  • An electric field is created by particles that
    5·1 answer
  • Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2Mg (s) + O2 (g) →→ 2MgO (s) When 4.50 g of magnes
    13·2 answers
  • This human cause process is called ____ and can drastically increase the natural process _____​
    11·2 answers
  • Both the freezing temperature and the melting temperature of water are the same(0°C). Explain why a substance like water freezes
    12·1 answer
  • What is the Noble gas notation for mercury (Hg)?.
    13·1 answer
  • A scientist compares two samples of white powder. one powder was present at the beginning of an experiment. the other powder was
    15·2 answers
  • PLEASEEEE I NEED HELPP
    14·1 answer
  • The sun is located in the center of our solar system. Where is the sun located in our disc-shaped
    11·1 answer
  • What is the molecular formula of a compound with the empirical SO and molecular weight 96.13?
    7·1 answer
  • Since gasses weigh nothing when they are produced in a reaction they do not have to be accounted for.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!