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qwelly [4]
3 years ago
12

a cylinder rod formed from silicon is 46.0cm long and has a mass of 3.10kg. The density of silicon is 2.33g/cm3. what is the dia

meter of the cylinder?
Chemistry
1 answer:
Julli [10]3 years ago
6 0
<span>Density is a physical property which describes the mass of a substance per unit of volume of the substance. It is expressed as Density = m / V and it has units like g/cm^3. To determine the diameter of the cylinder, we use the definition of density. We first calculate the volume from density as follows:

Density = mass / volume
Volume = mass / density
Volume = 310 g / 2.33 g/cm^3
Volume = 133.15 cm^3

Volume of a cylinder is equal to the product of pi, square of the radius of the base and the height. It is expressed as follows:

Volume = </span>πr^2h

We calculate for the radius, r, which is equal to one half the diameter.

r = √(Volume / πh)
r = √133.15 / π(46)
r = 0.9595 cm
Diameter = 2r = 2 (0.9595) = 1.92 cm
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Ans with solution...
Licemer1 [7]

Answer:

The answer to your question is:

Vol of NO2 = 11.19 L

Vol of O2 = 2.8 L

Explanation:

Data

N2O5 = 56 g

STP     T = 0°C = 273°K

           P = 1 atm

MW N2O5 = 216 g

Gases law = PV = nRT

Process

                   216 g of N2O5 ---------------- 1 mol

                     54 g               -----------------  x

                    x = (54 x 1) / 216

                    x = 0.25 mol of N2O5

                   2 mol of N2O5 -----------------  4 mol of NO2

                   0.25 mol          ------------------    x

                   x = (0.25 x 4) / 2 = 0.5 mol of NO2

                   V = nRT/P

                   V = (0.5)(0.082)(273) / 1 = 11.19 L

                   2 mol of N2O5 ----------------- 1 O2

                   0.25 N2O5 ----------------------  x

                   x = (0.25 x 1) / 2 = 0.125 mol

                   Vol = (0.125)((0.082)(273) / 1 = 2.8 L

3 0
4 years ago
4. Arrange the following substances in order of increasing boiling point: CH3CH2OH, HOCH2CH2OH, CH3CH2Cl , and ClCH2CH2OH A. CH3
Studentka2010 [4]

Answer: Option (B) is the correct answer.

Explanation:

A molecules that will have more number of hydrogen bonding will has highest boiling point because to break the hydrogen bonds high heat needs to be provided.

So, in the molecule HOCH_{2}CH_{2}OH there is presence of two alcoholic groups. Hence, it will have strongest hydrogen bonding as compared to the rest of molecules.

In the molecule ClCH_{2}CH_{2}OH there will be hydrogen bonding and dipole-dipole interactions. Hence, it boiling point will be slightly less than HOCH_{2}CH_{2}OH.

In the molecule CH_{3}CH_{2}OH, there will be only hydrogen bonding. Hence, its boiling point is less than ClCH_{2}CH_{2}OH.

In the molecule CH_{3}CH_{2}Cl, there is no hydrogen bonding but there will be only dipole-dipole interactions. Hence, its boiling point will be the least.

Therefore, we can conclude that increasing order of boiling point will be as follows.

        CH_{3}CH_{2}Cl < CH_{3}CH_{2}OH < ClCH_{2}CH_{2}OH < HOCH_{2}CH_{2}OH

6 0
3 years ago
What is a valence electron and why are they so important to a chemist?
Reika [66]
They are important because they are the electrons that help the atom to bond with another atom. They are in the outer most shell. ☺️
3 0
3 years ago
What best describes the location of an atom's electrons? (1 point)
dem82 [27]

Answer:

The common way electrons are found in shells or orbitals that surround the nucleus of an atom.I hope it helped

Explanation:

pls mark brainliest

8 0
3 years ago
Write the chemical properties of metal with an example of each​
STatiana [176]

Answer:

high density, malleable, ductile, can corrode, good conductors,

Explanation:

gold's density is 19.3 g/cc compared to something like water which is 1g/cc

aluminum is extremely malleable, it can be flattened into thin sheets

copper can be formed into complex forms without breaking like wire, instruments, and bed frames

steel can get corroded by the oxygen particles in the air if it stays out too long.

copper is an excellent example of a conductor, it is used to make wires which conduct electricity that brings "power" into things like lights, computers, and TVs

6 0
2 years ago
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