percentage

Amazon rainforests are considered as 'lungs of the planet' as they contribute______of the total oxygen in the earth's atmosphere. (a) 10 % (b) 15 % (c) 20 % (d) 30 %

In which of the following reactions, SN^2 rate increases on changing the solvent from (95 % acetone + 5 % H_2 O ) to (80 % acetone + 20 % H_2O ) ?

About 97 % of oxygen is transported by RBC. The remaining 3 % is

A normal woman, whose father had color blindness, married a normal man. What is the chance of occurrence of color blindness in the progeny? (a) 25 % (b) 50 % (c) 100 % (d) 75 %

A compound contains 42.3913 % K,15.2173 % Fe,19.5652 % C and 22.8260 % N . The molecular mass of the compound is 368 u. Find the molecular formula of the compound.

Plastocyanin' (PC) contains :

% of daily destruction of RBC :-

The equation E=pc is valid