For the decomposition of A to B and C, A(s)⇌B(g)+C(g)how will the reaction respond to each of the following changes at equilibrium?Drag the appropriate items to their respective bins. a) double the concentration of B and halve the concentration of C
b) double the concentrations of both products and then quadruple the container volume
c) double the container volume.
d) double the concentrations of both products.
e) add more A
f) double the concentrations of both products and then double the container volume

i. LEFTWARD SHIFT
ii. NO SHIFT
iii. RIGHTWARD SHIFT

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 density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the answer is barium and copper bromide