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
dezoksy [38]
3 years ago
11

PLEASE I NEED HELP NOW!!! I WILL GIVE 25 POINTS

Chemistry
1 answer:
padilas [110]3 years ago
8 0
If I did this correctly the balanced equation would be:
14H⁺+Cr₂O₇²⁻+6I⁻→3I₂+2Cr³⁺+7H₂O

oxidation half: (iodide was oxidized)
2I⁻→I₂+2e⁻

reduction half: (chromium was reduced)
14H⁺+Cr₂O₇²⁻+6e⁻→2Cr³⁺+7H₂O

H⁺ comes from the solution.  It is in the final reaction since in redox reactions the oxygen is turned into water since it can't just go away.  I multiplied the oxidation half reaction by 3 in order for both half reactions to half the same number of electrons since equal numbers of electrons need to be lost and gained for the reaction to be balanced.

I hope this helps.  Let me know if anything is unclear.
You might be interested in
Which of the following describes the characteristics of a plasma?
Scorpion4ik [409]

There are essentially 5 states of matter-

1) Solid

2) Liquid

3) Gas

4) Plasma

5) Bose-Einstein Condensate

Plasma comprises of positive and negatively charged particles that are formed in extremely high temperature conditions. A characteristic of plasma is that it is not dense enough. The ions tend to be far apart, which makes them to spread out and imparts compressibility.

Ans B)

7 0
3 years ago
Which mistake did Maria make on her diagram
zzz [600]
There’s no pic for me to awnser your question
6 0
3 years ago
Read 2 more answers
How many significant figures are in the measurement 0.0030010 kilograms?
devlian [24]
There are 5 significant figures
6 0
3 years ago
Read 2 more answers
According to the data, the temperature of the
Vadim26 [7]

Answer: 351

Explanation: From °C to kelvin we do

K=273+°C

From Kelvin to °C we do

°C=K-273 or -273+ K

7 0
3 years ago
What is the mass percent of oxygen (0) in SO2?
vazorg [7]

Answer:

D. (16.0 g + 16.0 g) × 100% / (32.1 g + 16.0 g + 16.0 g) = 49.9%

Explanation:

Step 1: Detemine the mass of O in SO₂

There are 2 atoms of O in 1 molecule of SO₂. Then,

m(O) = 2 × 16.0 g = 16.0 g + 16.0 g = 32.0 g

Step 2: Determine the mass of SO₂

m(SO₂) = 1 × mS + 2 × mO = 1 × 32.1 g + 2 × 16.0 g = 32.1 g + 16.0 g + 16.0 g = 64.1 g

Step 3: Detemine the mass percent of oxygen in SO₂

We will use the following expression.

m(O)/m(SO₂) × 100%

(16.0 g + 16.0 g) × 100% / (32.1 g + 16.0 g + 16.0 g) = 49.9%

5 0
3 years ago
Other questions:
  • How have safety concerns about chemicals changed over time?
    10·1 answer
  • 100 points!! Brainliest if correct!!
    10·2 answers
  • A chemical that can superheat or give off poisonous vapors when it comes in contact with air or water is called
    8·1 answer
  • For a single component system, why do the allotropes stable at high temperatures have higher enthalpies than allotropes stable a
    6·1 answer
  • Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation f
    7·1 answer
  • State the three rules that define how electrons are arranged in atoms
    9·2 answers
  • I need simple answers that a 14-year-old would understand.
    14·1 answer
  • How many grams of NaF form when .5 mol of HF reacts with excess Na2SiO3?
    12·1 answer
  • vIt is the middle of winter when you go to the store to buy some balloons for a birthday party. After you get to your car with t
    13·2 answers
  • When Iron (III) Choride is added to a solution of synthesized aspirin what is the method of detection
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!