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Eduardwww [97]
4 years ago
12

You want to create a garden that is 9 km long, 8.35 hm wide, and 35 cm deep. Calculate the volume in m^3 of dirt that you will n

eed to fill your garden. *
3 points
2630.25
26302.5
2630250
263025000
Chemistry
1 answer:
Vanyuwa [196]4 years ago
4 0

Answer:

V=2630250m^3

Explanation:

Hello,

In this case, since we need the volume in cubic meters and the given dimensions are in different units, the first step is to compute all of them in m:

L=9km*\frac{1000m}{1km}=9000m\\ \\W=8.35hm*\frac{100m}{1hm}=835m\\ \\H=35cm*\frac{1m}{100cm} =0.35m

Thus, the volume is computed by:

V=H*L*W\\\\V=9000m*835m*0.35m\\\\V=2630250m^3

Best regards.

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A 0.245-L flask contains 0.467 mol co2 at 159 °c. Calculate the pressure using the ideal gas law.
lubasha [3.4K]

Answer:

Pressure, P = 67.57 atm

Explanation:

<u>Given the following data;</u>

  • Volume = 0.245 L
  • Number of moles = 0.467 moles
  • Temperature = 159°C
  • Ideal gas constant, R = 0.08206 L·atm/mol·K

<u>Conversion:</u>

We would convert the value of the temperature in Celsius to Kelvin.

T = 273 + °C

T = 273 + 159

T = 432 Kelvin

To find the pressure of the gas, we would use the ideal gas law;

PV = nRT

Where;

  • P is the pressure.
  • V is the volume.
  • n is the number of moles of substance.
  • R is the ideal gas constant.
  • T is the temperature.

Making P the subject of formula, we have;

P = \frac {nRT}{V}

Substituting into the formula, we have;

P = \frac {0.467*0.08206*432}{0.245}

P = \frac {16.5551}{0.245}

<em>Pressure, P = 67.57 atm</em>

4 0
3 years ago
Why do scientist use models to study atoms and molecules?
Nesterboy [21]
This allows us to visually see the structure of the atoms/ molecules so we can get a better understanding of what they look like.
6 0
4 years ago
Calculate the freezing point of a solution that contains 8.0 g of sucrose (C12H22O11) in 100 g of H2O. Kf for H2O = 1.86C/m
Aleks04 [339]

The freezing point of the sucrose solution is -0.435°C.

<h3>What is the freezing point of the solution?</h3>

The freezing point of the solution is determined from the freezing point depression formula below:

  • ΔT = mKf(H₂O)

Kf(H₂O) = 1.86 Cm

m is molality of solution = moles of solute/mass of solvent

moles of sucrose = 8.0/342.3 = 0.0233 moles

m = 0.0233/0.1 = 0.233 molal

ΔT = 0.233 m * 1.86°C/m.

ΔT = 0.435 °C.

Freezing point of sucrose solution = 0°C - 0.435°C

Freezing point of sucrose solution  = -0.435°C.

In conclusion, the freezing point of sucrose solution is determined from the freezing point depression.

Learn more about freezing point depression at: brainly.com/question/19340523

#SPJ1

8 0
2 years ago
Why was Niels Bohr’s atomic model superior to all the earlier models?
Elena L [17]

Answer the correct option will be option B.

Explanation: this is how he showed the electron could orbit the nucleus without falling into it. This is so because he explained that the electron  revolves around the nucleus  in a fixed circular orbit with fixed energy and cannot occupy just any energy level which is defined as quantisation of energy.

option A is one of postulates given by Dalton in his Dalton's atomic theory which later proved to be wrong.

option C  it is one of the postulates given by the in J.J Thomson in his model of  an atom which was the first atomic model.

option D Schrodinger has used the wave nature to explain the position of electrons around the nucleus.


5 0
3 years ago
Help me please i need this aaaaaaaaa &lt;3
mylen [45]
Can someone help me out too? , on my question?
4 0
3 years ago
Read 2 more answers
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