Chemistry, 28.09.2019 13:30 charethafoster

What mass of nh3 can be made from 35.0g of n2?

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Answer from: klaw4497

Formation of ammonia by nitrogen and hydrogen is habers process wher 28g N2 results in formation of 34g NH3
so 35g N2 will form 34*35/28=42.5g NH3 where it given that reaction takes place in excess of H2
N2+3H2 gives 2NH3

Answer from: neelydeY23

$Mass_{NH_3}= 42.5775\ g$

Explanation:

Moles of N_2 :-

Mass = 35.00 g

Molar mass of N_2 = 28.014 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{35.00\ g}{28.014\ g/mol}$

$Moles_{N_2}= 1.25\ mol$

According to the reaction:-

$N_2_{(g)} + 3H_2_{(g)}\rightarrow 2NH_3_{(g)}$

1 mole of N_2 on reaction forms 2 moles of NH_3

1.25 mole of N_2 on reaction forms 2*1.25 moles of NH_3

Moles of NH_3 = 2.5 moles

Molar mass of NH_3 = 17.031 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$2.5\ mol= \frac{Mass}{17.031\ g/mol}$

$Mass_{NH_3}= 42.5775\ g$

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

It was ernest rutherford

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