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GuDViN [60]
3 years ago
13

How many individual C_60 fullerene molecules are in 1.5 uL of a 10-M solution toluene? antenn traveling at 10.000 m/s.

Chemistry
1 answer:
lianna [129]3 years ago
6 0

Answer:

9.0345 × 10¹⁸

Explanation:

Given:

Volume = 1.5 μL = 1.5 x 10⁻⁶ L

Molarity = 10 M

Now,

Number of moles = Molarity × volume

on substituting the values, we get

Number of moles = 10 × 1.5 x 10⁻⁶

or

Number of moles = 1.5 x 10⁻⁵  

Also,

1 mole contains 6.023 × 10²³ molecules

therefore,

1.5 x 10⁻⁵ moles will contain = 6.023 x 10²³ × 1.5 × 10⁻⁵ = 9.0345 × 10¹⁸

Hence,

The number of C₆₀ molecules present are  9.0345 × 10¹⁸

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lidiya [134]

{\orange { \mathbb{ \huge{QUESTION}}}}

WHAT IS AN IONIC BOND

\huge\boxed{\fcolorbox{red}{blue}{ ANSWER }}

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6 0
3 years ago
Read 2 more answers
Explain why vanadium (radius=134 pm) and copper (radius=128 pm) have nearly identical atomic radii, even though the atomic numbe
Viktor [21]
<span>There are few main factors affecting the atomic radii, the outermost electrons and the protons in the nucleus and also the shielding of the internal electrons. I would speculate that the difference in radii is given by the electron clouds since the electrons difference in these two elements is in the d orbital and both has at least 1 electron in the 4s (this 4s electron is the outermost electron in all the transition metals of this period). The atomic radio will be mostly dependent of these 4s electrons than in the d electrons. Besides that, you can see that increasing the atomic number will increase the number of protons in the nucleus decreasing the ratio of the atoms along a period. The Cu is an exception and will accommodate one of the 4s electrons in the p orbital.

</span><span>Regarding the density you can find the density of Cu = 8.96g/cm3 and vanadium = 6.0g/cm3. This also correlates with the idea that if these two atoms have similar volume and one has more mass (more protons;  density is the relationship between m/V), then a bigger mass for a similar volume will result in a bigger density.</span>
7 0
4 years ago
A fish company delivers 22 kg of salmon, 5.5 kg of crab and 3.48 kg of oysters to your seafood restaurant. What is the mass, in
Rainbow [258]

Answer:

Mass of sea food = 30.98 Kg

Mass of sea food in pound = 68.31 lbs

Explanation:

Salmon, crab and oysters all are sea food.

Mass of sea food = Mass of salmon + Mass of crab + mass of oyster

Mass of salmon = 22 kg

Mass of crab = 5.5 kg

Mass of oysters = 3.48 kg

Mass of sea food = Mass of salmon + Mass of crab + mass of oyster

                             = 22 + 5.5 + 3.48

                             = 30.98 Kg

1 Kg = 2.205 lbs

Therefore, 30.98 kg = 30.98 × 2.205

                                 = 68.31 lbs

8 0
3 years ago
Ni2+(aq) + 6 NH3(aq) ⇌ Ni(NH3)6 2+(aq)
Jet001 [13]

Answer:

a) ΔGº= -49,9 KJ/mol = - 50 KJ/mol

b) The reaction  goes to the right to formation of products

c) ΔG= 84,42 KJ/mol. The direction is to reactive, to the left

Explanation:

a) ΔGº= - RTLnKf

You need to convert Cº to K. 25ºC=298K

Then, ΔGº= - 3,814 J/molK * 298K* Ln(5.6 *10^8)= - 49906 J/mol = -49,9 KJ/mol = - 50 KJ/mol

b) The ΔGº < 0, that means the direct reaction is spontaneous when te reactive and products are in standard state. In other words the reaction goes to the right, to formation of products

c) The general ecuation for chemical reaction is aA + bB → cD + dD. Thus

ΔG=ΔGº + RTLn (([C]^c*[D]^d)/[A]^a*[B]^b)

In this case,

ΔG=ΔGº + RTLn ([Ni(NH3)62+] / [Ni2+]*[NH3]^6 )= 84417 J/mol =84,42 KJ/mol

ΔG >0 means the reaction isn't spontaneous in the direction of the products. Therefore the direction is to reactive, to the left

8 0
3 years ago
Write a balanced chemical equation based on the following: Solid magnesium metal reacts with chlorine gas to produce solid magne
iragen [17]

Answer:

Mg + Cl2 = MgCl2

I hope it helps

7 0
3 years ago
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