Acompound of formula xcl3 reacts with aqueous agno3 to yield solid agcl according to the following equation: xcl3(aq)+3agno3(aq)→x(no3)3(aq)+3ag cl(s) when a solution containing 0.521 g of xcl3 was allowed to react with an excess of aqueous agno3, 1.68 g of solid agcl was formed. what is the identity of the atom x?

Aluminum

Explanation:

Mass of = 1.68 g

Molar mass of = 143.32 g/mol

Thus,

From the reaction below:

3 moles of are produced when 1 mole of undergoes reaction.

So,

1 mole of are produced when mole of undergoes reaction.

0.01172 mole of are produced when mole of undergoes reaction.

Thus, moles of = 0.0039 moles

Let the atomic mass of X = x g/mol

atomic mass of chlorine = 35.5 g/mol

Thus, Molar mass of = x + 3(35.5) g/mol = x + 106.5 g/mol

Moles = 0.0039 moles

Mass = 0.521 g

Thus, molar mass = Given mass/ Moles = 0.521 / 0.0039 = 133.5897 g/mol

So,

x + 106.5 = 133.5897

x = 27.0897 g/mol

This Atomic weight corresponds to Aluminum. Hence, X is aluminum.

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.

the answer is a and have a great day