If given a water barometer shows reading 6mmHg, is converting to mmH2O converted by following eq:?

Question

6 X (density of mecury)/(density of water)

Answer 1

yes it is

back to the basic:

to calculate pressure :

(height of mercuy)x(density of mercury)xg = (height of water)x(density of water)xg

simplify it you'll get

6 X (density of mecury)/(density of water)

Answer 2

Only a mercury barometer will read 6mmHg.

To convert this reading to mmH2O, multiply it by RHOm/RHOw