What would be the height of the column in a barometer if the external pressure was 101kpa and water (d=1.00g/cm^3) was used in place of mercury ??
a)0.0558m
b)0.760m
c)1.03×10^4m
d)10.3m
e)0.103m

Answer : The height of the column in a barometer is, 10.3 m

Explanation :

To calculate the height of the column in a barometer we are using formula as:

where,

P = external pressure =

Conversion used :

h = height of the column in a barometer = ?

= density of water =

Conversion used :

g = constant of gravity =

Now put all the given values in the above formula, we get:

Therefore, the height of the column in a barometer is, 10.3 m

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms