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
alex41 [277]
3 years ago
6

Which of the following ions is in the lowest oxidation state?

Chemistry
2 answers:
hodyreva [135]3 years ago
7 0

Answer:

B. Cr in Cr_{2}O_{7}^{-2}

Explanation:

Let us first find the oxidation numbers in each of the following scenarios

A. The oxidation number of P in H_{2}PO_{4}^{-} \\ is +5

    because 2H + 4O + P = -1

                    2(1) +4(-2)  + P = -1

                              P = 5

B. The oxidation number of Cr in Cr_{2}O_{7} ]^{-2} \\ is

                 2Cr + 7O = -2

                 2Cr + 7(-2) = -2

                           Cr = 6

C. The oxidation number of Fe in Fe_{2}O_{3} is +3

                          2Fe + 3O = 0

                          2Fe + 3(-2) = 0

                               Fe = 3

The final answer is Cr

bulgar [2K]3 years ago
5 0

Answer:

I believe it is a hope this helps

You might be interested in
Are solar and lunar eclipses processed by the movements of the Earth and moon?
Inga [223]

Explanation:

As the Earth rotates on its axis and revolves around the Sun, several different effects are produced. When the new moon comes between the Earth and the Sun along the ecliptic, a solar eclipse is produced. When the Earth comes between the full moon and the Sun along the ecliptic, a lunar eclipse occurs.

7 0
3 years ago
Read 2 more answers
Name two factors that influence the viscosity of a lava flow
mr_godi [17]
Three factors that affect magma viscosity are temperature, composition, and presence of dissolved gases. 
6 0
3 years ago
Passing an electric current through a sample of water (H2O) can cause the water to decompose into hydrogen gas (H2) and oxygen g
Andreas93 [3]
2H2O --> 2H2 + O2
The mole H2O:mole O2 ratio is 2:1
Now determine how many moles of O2 are in 50g: 50g × 1mol/32g = 1.56 moles O2
Since 1 mole of O2 was produced for every 2 moles of H2O, we need 2×O2moles = H2O moles
2×1.56 = 3.13 moles H2O
Finally, convert moles to grams for H2O:
3.13moles × 18g/mol = 56.28 g H2O
D) 56.28
7 0
3 years ago
How do you convert between the volume of a gas at STP and the number of moles of the gas?
Naya [18.7K]
Standard temperature and pressure (STP) means a temperature of 0°c and a pressure of 1 atmosphere (atm). The molar gas volume is used to convert between the number of moles of a gas and the volume of the gas at STP. One mole of a gas occupies a volume of 22400 cm³ or 22.4 liters at STP according to the molar gas volume.
6 0
3 years ago
Compare and contrast the differences between plant animal cells
Step2247 [10]

Answer:

are there answer choices? chloroplasts are in plant cells, these give it a green color  

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • the normal boiling point of liquid x is less than of y which is less than that of z which of the following is in the correct ord
    10·1 answer
  • How do compounds differ from their component elements?
    12·1 answer
  • Dry ice is solid carbon dioxide. A 1.65−g sample of dry ice is placed in an evacuated 3.93−L vessel at 23.0°C. Calculate the pre
    11·1 answer
  • 2. Which of the following is a physical property that Mendeleev used to design the periodic table?
    15·1 answer
  • Can someone please check my answer?
    8·2 answers
  • Which of the following is not a cause of water pollution?
    15·1 answer
  • Which statement compares you tractive forces that hold particles together​
    12·1 answer
  • Use the equation to answer the question.
    5·2 answers
  • Which resource produces the cleanest energy?
    8·1 answer
  • Conservation Models Activity
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!