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
ratelena [41]
3 years ago
13

Desperate Please Hurry

Chemistry
2 answers:
Zepler [3.9K]3 years ago
8 0

Answer:

Explanation:

Are there any awnser choices?

iragen [17]3 years ago
8 0
Many believed that since the moon and sun were a circle or round shape they believed that’s also how the earth was shaped. Hope this can help!
You might be interested in
A 25.0 ml sample of an unknown monoprotic acid was titrated with 0.12 m naoh. the student added 31.6 ml of naoh and went past th
Inessa05 [86]
The procedure, which can be used to determine more accurately the concentration of the unknown acid is TO BACK-TITRATE WITH ADDITIONAL HYDROCHLORIC ACID TO NEUTRALIZE THE ADDITIONAL SODIUM HYDROXIDE THAT WAS ADDED.
Monoprotic acids are acids that can donate only one proton per each molecule and they have only one equivalence point. Examples of monoprotic acids are HCI, HNO3 and CH3COOH.
The back titration method is typically used when one needs to determine the concentration of an analyte provided there is a known molar concentration of excess reactants. 
From the information given in the question above, we are told that excess NaOH was added. To correct this mistake, the right thing to do is to use additional HCl to carry out back titration, taking note of the quantity of acid that will be needed to neutralize the excess NaOH.
7 0
3 years ago
What is the entropy change of the system when 17.5 g of liquid benzene (c6h6) evaporates at the normal boiling point? the normal
Vika [28.1K]
<span>1 mole of benzene (78g) requires 30.8 kJ/ of heat, so 11.5g will need ..... (it's a proportion calculation.) Temperature does not change at BPt and is not relevant if the temp of the liquid is already at the BPt ne definition of entropy is qrev/T, where qrev is the heat added in reversible operation (for complicated reasons pertaining to heat as a path function) and T is the temperature at which this is done. Phase changes are particularly good examples for calculations of changes in entropy, since temperature will not change will the bonds of a state are being broken. The calculations required boils down to: 1) finding the moles of benzene given from molar mass. 2) multiplying that moles by the heat of vaporization. 3)diving the heat energy required by the temperature of boiling point.</span>
7 0
3 years ago
Read 2 more answers
How many liters of 4M solution can be made using 100 grams of lithium bromide
uysha [10]
Molar mass of LiBr (mm )= 86.845 g/mol

Molarity ( M ) = 4 M 

Mass of solute ( m ) = 100 g

Volume ( V ) = in liters ?

V = m / mm  * M

V = 100 / 86.845 * 4

V = 100 / 347.38

V = 0.2875 L

hope this helps!.
5 0
3 years ago
When a rock is altered by extreme heat and pressure, what type of rock is the result?
erik [133]
The way most metamorphic rock<span> is formed. Change in </span>rock is the result<span> of metamorphism over a large area. </span>Type of rock<span> texture that </span>results<span> when </span>extreme pressure<span> causes minerals in metamorphic </span>rock<span> to realign, or when minerals separate out into dark and light bands.</span>
6 0
3 years ago
Read 2 more answers
Thermal energy is a form of
Mrrafil [7]

Thermal energy is an example of kinetic energy, as it is due to the motion of particles, with motion being the key. Thermal energy results in an object or a system having a temperature that can be measured. Thermal energy can be transferred from one object or system to another in the form of  heat.                hope this helps

8 0
4 years ago
Read 2 more answers
Other questions:
  • Please help!!
    5·2 answers
  • What does PO4 stand for?
    7·1 answer
  • A solution is made by dissolving
    14·1 answer
  • How would you figure the number of protons or electrons in an atom
    12·1 answer
  • Cavalent bonds what are they?
    7·1 answer
  • During the second week, suppose you decide to use volumetric analysis. For each of the unknown compounds on the left, choose the
    13·1 answer
  • A symbiotic relationship in which both organisms benefit
    9·2 answers
  • Which is the command center of the body​
    11·2 answers
  • How are petrochemicals obtained from natural gas
    7·1 answer
  • 6. Alkali metals, alkaline earth metals, and halogens
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!