Answer:
7.07585×10^24 molecules
Explanation:
# of Moles X Avogadro's Number= # of Molecules
According to the concept of Avogadro's number, there are 7.075×10²⁴ molecules in 11.75 moles of water.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number. Number of molecules is calculated as:number of moles×Avogadro's number
∴number of molecules= 11.75×6.022×10²³=7.075×10²⁴ molecules.
Thus, there are 7.075×10²⁴ molecules in 11.75 moles of water .
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I wont graduate. Why can light be treated like a particle?
Answer:
maybe "A" but I'm not sure
Light can be treated like a particle becuase it comes in chunks of energy called photons.
Particle nature of lightLight exists in dual form, as wave and particle. Light can exist as a wave becuase it transfer energy from one point to another.
Light can also exist as particle becuase it consists of packs of energy known photons.
Thus, we can conclude that, light can be treated like a particle becuase it comes in chunks of energy called photons.
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10.A certain ion of an atom possesses 16 neutrons, a mass number of 31 and a charge
of-3, this ion then contains:
A. 19 protons
B. 13 electrons C. 12 electrons D. 18 electrons
Answer:
B. 13 electrons
Explanation:
Bcoz protons are the same with electrons and the neutrons too.
What is a nonpolar bond?
Answer:
Nonpolar covalent bonds are a type of bond that occurs when two atoms share a pair of electrons with each other. These shared electrons glue two or more atoms together to form a molecul
Explanation:
A gas sample occupies 2.1 L at a pressure of 101 kPa.
What volume will it occupy if the pressure is increased to 235 kPa?
A. 4.9 L
B. 1.6L
C. 1.2 L
D. 0.9 L
Answer:
D) 0.9 L
Explanation:
At constant temperature,
PV = Constant
so,
P1.V1 = P2. V2
101 × 2.1 = 235 × V2
V2 = 0.9 L
Answer:
0.9L
Explanation:
Given parameters:
Initial volume = 2.1L
Initial pressure = 101kPa
Final pressure = 235kPa
Unknown:
Final volume = ?
Solution:
The relationship is between pressure and volume. To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".
Mathematically;
P₁V₁ = P₂V₂
P₁ is the initial pressure
V₁ is the initial volume
P₂ is the final pressure
V₂ is the final volume
Now insert the parameters and solve;
2.1 x 100 = 235 x V₂
V₂ = 0.89L
What is the complementary DNA sequence to A-T-T-G-C-A?
Answer:
T-A-A-C-G-A or just TAACGA
Explanation:
A=T
G=C
C=G
T=A
This is the answer key to all complementary DNA strands.
Hope this helps you out.
Eggs turn into omelet physical or chemical
Read the passage from Hamlet, Act III, Scene iv.
Gertrude: What wilt thou do? thou wilt not murder me?
Help, help, h!
Polonius: [Behind.] What, h! help! help! help!
Hamlet: [Draws.] How now! a rat? Dead, for a ducat, dead! [Makes a pass through the arras.]
Polonius: [Behind.] O! I am slain.
Gertrude: O me! what hast thou done?
Hamlet: Nay, I know not: is it the king?
Gertrude: O! what a rash and bloody deed is this!
Which element of tragedy does Shakespeare most develop in this passage?
conflict among characters
suspense in the plot
hero overcoming tragedy
unhappy ending for the main character
Answer:
conflict among characters
Explanation:
Answer:
Conflicting among characters
Explanation:
if water were a non-polar
Molecule
Answer:
Water would not be able to transport nutrients -‐-‐ in plants, or in our bodies -‐-‐ nor to dissolve and transport waste products out of our bodies. ... Cohesiveness, adhesiveness, and surface tension: would decrease because without the +/-‐ polarity, water would not form hydrogen bonds between H20 molecules.
which period of the periodic table is completely made up of elements with no known stable ions?
Answer:
I think the answer is period 7
Explanation:
The period in periodic table, in which no stable ions of elements exists is 7th period. They contains actinides.
What are actinides?Actinides are 7th period elements classified to F block of periodic table. A periodic table contains vertical columns called groups and horizontal rows called periods. Each elements are classified into suitable groups based on their similarity in properties with other group elements.
There are four blocks in periodic table which are s, p, d and f block. S block elements are metals and d block contains transition metals and p block have non metals including gases and metalloids.
Actinides are f- block metals. All the elements in the period are radioactive. That's why they don't have a stable isotope or ion. They continuously undergo radioactive decay by the emission of charged particles.
Hence, the period containing unstable elements is 7th one.
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