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aleksley [76]
2 years ago
5

Application Question: In Lancaster county, Pennsylvania, it is common for members of the Amish community to use wind mills to pu

mp water from underground to fill a tank for drinking water. The wind causes the turbine blades to spin, rotating a shaft, which is transferred through some gears to operate a pump that is plugged in to an outlet, which pumps water up from deep below the ground to fill an above ground tank. Identify the energy conversions happening in the fill in the blank question on the right.
Word bank (not all words will be used): sound, light, thermal, nuclear, elastic, gravitational, kinetic, electrical
4
Required
Wind blows (--------- energy) causing the turbine to turn, which rotates the shaft and allows the water pump (-----------) to work. The pump causes the water to move up from the well ( energy) where the water is stored in a tank that is positioned 5 feet above the ground (gravitational potential energy).
Chemistry
1 answer:
Gemiola [76]2 years ago
7 0

Wind blows__wind energy ____causing the turbine to turn, rotating shaft works pump__mechanical___energy.

Motion of water moving up from well___kinetic energy___energy.

Water in tank which is positioned 5 feet above the ground level______potential energy

Explanation:

Wind has in it wind energy which is then used to rotate the turbine shaft which is a form of mechanical work and hence possess mechanical energy

Moving water posses kinetic energy and when this water is kept at some height it possess potential energy

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A sample of gas has a mass of 20.00 g and occupies 44.8 L at STP. What is the molar mass of the gas?

We know that 1 mol of an ideal gas at STP occupies 22.4 L. So we will use that relationship to find the number of moles of the gas that occupies 44.8 L.

number of moles = 44.8 L * 1 mol/(22.4 L) = 2.00 moles

number of moles = 2.00 moles

Another way of getting the same result is:

STP means that the pressure is 1 atm and the temperature is 273.15 K. And the volume of our sample is 44.8 L

P * V = n * R * T

n = P * V/(R * T)

n = 1 atm * 44.8 L / (0.082 atm*L/mol*K * 273.15 K)

n = 2.00 moles

So two moles of an ideal gas occupies 44.8 L at STP.

The mass of the sample is 20.00 g and we have 2 moles. So the molar mass is:

molar mass = (mass of sample)/(number of moles of the sample)

molar mass = 20.00 g/(2.00 moles)

molar mass = 10.0 g/mol

Another way of solving it:

Since the mass of two moles of our gas is 20.00 g, we can find the mass of 1 mol by solving this:

2.00 moles of gas ______ 20.00 g

1.00 mol of gas _____ x = ?

x = 1.00 mol * 20.00 g/2.00 moles = 10.0 g

So the mass of 1 mol is 10.0 g. Then the molar mass is 10.0 g/mol.

Answer: the molar mass of the gas is 10.0 g/mol

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The naming of alkane is done by adding the suffix -ane, alkene by adding the suffix -ene, alkyne by adding the suffix -yne.

If two or more similar alkyl groups are present in a compound, the prefixes di-, tri-, tetra- and so on are used to specify the number of times of the alkyl groups in the chain.

In the give compound, the longest possible carbon chain has 6 carbon atoms. So, the prefix used will be 'hex-' and also the carbon has single bond between them, so it is an alkane. Four methyl group is present at 2,2,4,5 position of carbon chain and one ethyl group is present at 3 position.

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