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
Lana71 [14]
2 years ago
7

I have been stuck on this for a while I know you work it out through Hess's law but I can't seem to have the equations balanced

to cancel out

Chemistry
1 answer:
katovenus [111]2 years ago
7 0

Answer:

uzb-prwk-khj

indians and all other countries can join

You might be interested in
Scientific explanations
Sergio039 [100]

I think that it's cannot include supernatural explanations, or C.

If i got it wrong sorry  

6 0
3 years ago
The molecular formula of a compound is C7H14O7. what is the empirical formula​
nata0808 [166]
Empirical formula is the simplest way the molecular formula can be wrote so here 7 goes into all of these so it would be CH2O
6 0
2 years ago
Here is a more complex redox reaction involving the dichromate ion in acidic solution: 3N O 2 − + 8H + + C r 2 O 7 2− → 3N O 3 −
Fantom [35]

Answer:

NO2- is the reducing agent.

Cr2O7_2- is the oxidizing agent.

H+ is neither

Explanation:

Reduction is the gain in electron. A chemical specie that undergoes reduction is called the oxidizing agent.

Oxidation is simply the loss in electrons. A chemical specie that undergoes oxidation is called the reducing agent.

Let us look at the species.

The first specie is the NO2-. In this specie, the oxidation number of nitrogen changed from +3 to +5 in NO3-. Thus we can see that there is more loss of electron to have caused an increase in the oxidation number positively. This shows an oxidation. Hence, NO2- is the reducing agent.

Let us look at the chromium. We can see that the oxidation number of chromium changed from +7 to +3.

Now we can see that it is a decrease and hence, it is a gain of electron and thus it is reduction. This means the first chromium specie is the oxidizing agent.

The hydrogen ion is simply placed there to balance the ions and hence it is neither the oxidizing nor the reducing agent.

4 0
3 years ago
Hi! I need help with this question, if it is possible, please answer immediately.
Dennis_Churaev [7]

Answer:

A.

Explanation:

The paper clip allows elictricity to pass, unlike the eraser or paper

6 0
3 years ago
Which one of the following classes of organic compound does not contain the carbonyl (C=O) group?A) aldehydesB) carboxylic acids
vredina [299]

Answer: alcohols

Explanation:

The carbonyl group refers to C=O. It is contained in aldehyde, Ketones, carboxylic acids , esters, amides and acyl chlorides. They are not found in alcohols. The alchols are generally ROH. They do not contain any carbon-oxygen unsaturated bond in their structure hence the answer.

3 0
2 years ago
Other questions:
  • Determine the molecular mass of a gas where 3.87 g occupies 0.896 l at standard conditions.
    12·1 answer
  • Compounds usually have the same properties as the bonds they are made from true or false
    11·1 answer
  • Suppose you want to find out which dog food your dog likes best. Write about the experiment you would design. What variables do
    15·1 answer
  • Convert 42.0 microliters into liters
    14·1 answer
  • Akeem cut his finger during an investigation, and it is bleeding slightly. Before helping him bandage the wound,
    10·2 answers
  • An unknown compound contains only carbon, hydrogen, and oxygen. Combustion analysis of the compound gives the mass percent of 31
    8·1 answer
  • Directions: Fill in the blanks to complete the idea. 1. Constellations are group of that form pattems in the night sky 2. Ursa M
    12·1 answer
  • the starting materials completely lose their properties to form new substances chemical change 2. a change from one state of mat
    12·1 answer
  • Determine the ground-state electron configuration for each of the following elements: A. chlorine ______________________________
    13·1 answer
  • As the temperature of a gas increases, _____. (select all the options that correctly complete the sentence.)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!