Why is an antibody molecule is represented as `H_2L_2`?

1 mole H_2O represents

6.02 xx 10^24 molecules represents

Ethyl acetate is fomred by the reactoin between ethanol and acetic acid and the equilibrium is represented as: CH_3COOH(L) + C_2H_5OH(l) hArr CH_3COOC_2H_5(l) + H_2O(l) Starting with 0.5 mol of ethanol and 1.0 mol of acetic acid and maintaining it at 293 K,0.214 mol of ethhyl acetate is found after sometime.Has equilibrium been reached ?

Ethyl acetate is fomred by the reactoin between ethanol and acetic acid and the equilibrium is represented as: CH_3COOH(L) + C_2H_5OH(l) hArr CH_3COOC_2H_5(l) + H_2O(l) Write the concentration ratio (reaction quotient), Q_c ,for this reaction (note:water is not in excess and is not a solvent in this reactin).

Ethyl acetate is fomred by the reactoin between ethanol and acetic acid and the equilibrium is represented as: CH_3COOH(L) + C_2H_5OH(l) hArr CH_3COOC_2H_5(l) + H_2O(l) At 293 K,If one starts with 1.00 mol of acetic acid and 0.18 mol of ethanol,there is 0.171 mol of ethyl acetate in the final equilibrium mixture.Calculate the equilibrium constant.

L_2/(2I) represents

Why He_2 molecule is not stable ?

Why is O_2 molecule paramagnetic ?

If one of the lines represented by the equation ax^2+2hxy+by^2=0 is coincident with one of the lines represented by a'x^2+2h'xy+b'y^2=0 , then

The H-O-H angle in water molecule is about