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Zarrin [17]
3 years ago
6

A newspaper story describing the local celebration of Mole Day on October 23 (selected for Avogadro's number, 6.02 X 10^ 23 ) at

tempting to give the reader a sense of the size of the number by stating that a mole of M&Ms would be equal to 18 tractor trailers full. Assuming that an M&M occupies the volume of about 0.5 cm ^ 3 calculate the dimensions of a cube required to hold one mole of M&Ms. Would 18 tractor trailers be sufficient?
Chemistry
1 answer:
stepladder [879]3 years ago
8 0

Answer:

The answer is "670.176 km".

Explanation:

Volume of the occupies of one  M & M= 0.5 \ cm^3\\\\

M&M 1 mole= 6.02 \times 10^{23}\\\\

Calculating volume of M& M mole=  0.5 \ cm^3 \times 6.02 \times 10^{23}=3.01 \times 10^{23}\ cm^3\\\\

Calculating the cube moleL^3= 3.01 \times 10^{23}\ cm^3\\\\

L=6.70176 \times 10^{7}\ cm\\\\

   =6.70176 \times 10^{7}\ cm \times \frac{1\ m}{100\ cm}\\\\=670176\ m\\\\=670.176 \ km

Therefore 18 tractor trailers wouldn't be sufficient.

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Calculate the hight of a column of liquid glycerol in meters required to exert the same pressure as 3.02 m if CCl4?
katovenus [111]

Answer:

Approximately 3.81\; \rm m.

Explanation:

Look up the density \rho of carbon tetrachloride, \rm CCl_4, and glycerol:

  • Density of carbon tetrachloride: approximately 1.59\times 10^{3}\; \rm kg \cdot m^{-3}.
  • Density of glycerol: approximately 1.26\times 10^{3}\; \rm kg \cdot m^{-3}.

Let g denote the gravitational field strength. (Typically g \approx 9.81\; \rm N \cdot kg^{-1} near the surface of the earth.) For a column of liquid with a height of h, if the density of the liquid is \rho, the pressure at the bottom of the column would be:

P = \rho\cdot g \cdot h.

The pressure at the bottom of this carbon tetrachloride column would be:

\begin{aligned} P &= \rho \cdot g \cdot h \\ & \approx 1.59\times 10^{3} \; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1} \times 3.02 \; \rm m \approx 4.71 \times 10^{4} \; \rm N \cdot m^{-2} \end{aligned}.

Rearrange the equation P = \rho\cdot g \cdot h for h:

\displaystyle h = \frac{P}{\rho \cdot g}.

Apply this equation to calculate the height of the liquid glycerol column:

\begin{aligned}h &= \frac{P}{\rho \cdot g} \\ &\approx \frac{4.71 \times 10^{4}\; \rm N \cdot m^{-2}}{1.26 \times 10^{3}\; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1}} \approx 3.81\; \rm m\end{aligned}.

4 0
2 years ago
GIVING 25 POINTS PLUS BRAINLIEST FOR CORRECT ANSWERS!!!!
Airida [17]

Answer:

The answer to your question is:

Explanation:

e) 9.10 x 10³ + 2.2 x 10⁶ = 2.2091 x 10⁶

f) 1113.0 - 14.6 x 10² = -347 = -3.47 x 10²

g) 6.18 x 10⁻⁴⁵ + 4.72 x 10⁻⁴⁴ = 5.338 x 10⁻⁴⁴

h) 4.25 x 10⁻³ - 1.6 x 10⁻² = -0.01175 = -1.175 x 10 ⁻²

5.- Calculate ...

a) 2.63 x 10⁻⁴

b) 2.26 x 10¹³

c) 1.97 x 10²

d) 1.65 x 10⁻²³

e) 2.5 x 10⁻⁸³

f) 1.61 x 10¹⁴

g) 2 x 10⁷⁹

h) 2.37 x 10⁻⁷

7 0
2 years ago
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Choose all the answers that apply. What are examples of how science has influenced technology?
Fudgin [204]

Answer:

A and B

Explanation:

A: The discovery of x- rays is a scientific discovery that led to X-ray machines which is technology.

B: Finding out that massive amounts of energy can be released by splitting the nucleus of an atom was the discovery and it led to nuclear power plants.

Satellites helping scientists map the earth doesn't really have an example of science. It just says that Satellites help scientists, and satellites are technology.

Robotic machines are also technology. Robots assisting doctors in surgery is technology helping people not science influencing technology.

So A and B would be the answers.

Hope this helps :)

5 0
3 years ago
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The total amount of energy before and after a chemical reaction is the same. Therefore, energy is _____
ANTONII [103]

Answer:

The total amount of energy before and after a chemical reaction is the same. Thus, energy is Question 14 options: the same as mass.

Explanation:

5 0
3 years ago
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What do melting, evaporation, and sublimation have in common?
kvv77 [185]

Explanation:

Sublimation describes a solid turning directly into a gas. Melting, on the other hand, occurs when a solid turns into a liquid. Water can, under the right circumstances, sublimate, though it usually melts at temperatures above 0 degrees Celsius or 32 degrees Fahrenheit. Carbon dioxide (CO2), however, is very different. The conditions that determine whether CO2 melts or sublimates are both temperature and atmospheric pressure.

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2 years ago
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