Chemistry, 03.11.2019 11:31 dannyboy5911

Acompound analyzed as 18.0% carbon, 2.26% hydrogen, and 79.7% chlorine. calculate the empirical formula of the compound.

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To answer this item, our basis is 100g. We solve for the masses of the given elements in this item,

carbon: (0.18)(100 g) = 18 g
hydrogen: (0.0226)(100 g) = 2.26 g
chlorine: (0.797)(100 g) = 17.7 g

Then, we calculate for the number of moles by dividing the masses by the molar masses of the given elements.

Number of moles:

carbon = (18 g) x (1 mol / 12 g) = 1.5 moles
hydrogen = (2.26 g) x (1 mol/ 1.01 g) = 2.23 moles
chlorine = (79.7 g) x (1 mol / 35.45 g) = 2.25 moles

We get the ratio of the number of moles by dividing them with the lowest value, 1.5.
Carbon = 1.5 moles / 1.5 = 1
Hydrogen = 2.23 moles / 1.5 = 1.48
Chlorine = 2.25 / 1.5 = 1.5

The empirical formula is,
C1H1.5CL1.5
Simplifying,
C2H3Cl3

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

Answer from: Quest

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Acompound analyzed as 18.0% carbon, 2.26% hydrogen, and 79.7% chlorine. calculate the empirical form...

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