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
GenaCL600 [577]
3 years ago
14

7.25 x 10-6 What is the scientific notation

Chemistry
2 answers:
belka [17]3 years ago
7 0
66.5 is correct I just did this
ankoles [38]3 years ago
3 0
The answer will be 66.5
You might be interested in
Calculate the number of milliliters of 0.440 M KOH required to precipitate all of the Fe2+ ions in 187 mL of 0.692 M FeSO4 solut
EleoNora [17]

Answer:

588.2 mL

Explanation:

  • FeSO₄(aq) + 2KOH(aq) → Fe(OH)₂(s) + K₂SO₄(aq)

First we <u>calculate how many Fe⁺² moles reacted</u>, using the given <em>concentration and volume of FeSO₄ solution</em> (the number of FeSO₄ moles is equal to the number of Fe⁺² moles):

  • moles = molarity * volume
  • 187 mL * 0.692 M = 129.404 mmol Fe⁺²

Then we convert Fe⁺² moles to KOH moles, using the stoichiometric ratios:

  • 129.404 mmol Fe⁺² * \frac{2mmolKOH}{1mmolFeSO_4} = 258.808 mmol KOH

Finally we<u> calculate the required volume of KOH solution</u>, using <em>the given concentration and the calculated moles</em>:

  • volume = moles / molarity
  • 258.808 mmol KOH / 0.440 M = 588.2 mL
6 0
3 years ago
Draw the most stable resonance structure for the intermediate in the electrophilic aromatic bromination of aniline, anisole, and
ASHA 777 [7]

Answer:

Here's what I get

Explanation:

(a) Intermediates

The three structures below represent one contributor to the resonance-stabilized intermediate, in which the lone pair electrons on the heteroatom are participating (the + charge on the heteroatoms do not show up very well).

(b) Relative Stabilities

The relative stabilities decrease in the order shown.

N is more basic than O, so NH₂ is the best electron donating group (EDG) and will best stabilize the positive charge in the ring. However, the lone pair electrons on the N in acetanilide are also involved in resonance with the carbonyl group, so they are not as available for stabilization of the ring.

(c) Relative reactivities

The relative reactivities would be

C₆H₅-NH₂ >  C₆H₅-OCH₃ > C₆H₅-NHCOCH₃

4 0
3 years ago
A 5 gram round ball has a density of 1.25 grams/milliliter. What is the volume of the round ball?
Arlecino [84]

Explanation:

m=5g

density=1.25g/ml

density=m/v

v=m/density=5/1.25

4 0
3 years ago
I NEED HELP ASAP PLEASE
AnnyKZ [126]

One molecule of ammonia is composed of two atoms of nitrogen and three atoms of hydrogen. Option B.

<h3>What is an equation?</h3>

The term chemical equation has to do with the presentation of a chemical reaction on paper in a way that it can be easily understood. It is easy to write an equation to show what is going on in a reaction system.

Now we have the reactions as shown in the question. In this reaction which is the synthesis of ammonia and occurs industrially in the Haber process. The statement that is not true is that; one molecule of ammonia is composed of two atoms of nitrogen and three atoms of hydrogen. Option B.

Learn more about chemical equation:brainly.com/question/28294176

#SPJ1

4 0
2 years ago
Science does not include<br><br> beliefs or opinions<br> theories<br> laws<br> conclusions
denpristay [2]
Beliefs or opinions
8 0
3 years ago
Other questions:
  • If an atom is located in the 3rd period, which of the following is true:
    13·1 answer
  • Two colorless solutions are mixed together bubbles form as the solution is stirred give two possible explanations for this resul
    15·1 answer
  • What property do all of the group 18 elements have that make them stand out from other elements?
    10·1 answer
  • If a cube has a volume of 2cm3 and amass of 12.8 grams what is its density
    6·2 answers
  • The half-reactions involved in the lactate dehydrogenase (ldh) reaction and their standard reduction potentials are
    5·1 answer
  • Read the list of substances. Spoon, Styrofoam cup, Scissors, Pencil. Which substances are likely to float in water?
    11·2 answers
  • (vii). Give two uses of chlorine gas.​
    8·1 answer
  • A chemical reaction occurs between Calcium, Oxygen, and Chlorine. The reaction is demonstrated:
    15·2 answers
  • What is the melting point for neon
    14·1 answer
  • Explain how a lithium ion develops a +1 charge when it loses one electron.​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!