100mL of 0.02M benzoic acid (pKa4.2) is titrated using 0.02M NaOH .pH after 50mL and 100mL of NaOH have been added are
Q. One atom of element weight 6.644×10-23g.calculate the gram atom(number of moles of the atom) of 20kg of it
how many B-O-B linkage in a molecule of borax have both boron atoms sp3
One litre hard water contains 12.00 mg Mg2+. Milli-equivalents of washing soda required to remove its hardness is
1. In which quadrant or on which axis do each of the points (– 2, 4), (3, – 1), (– 1, 0),(1, 2) and (– 3, – 5) lie? Verify your answer by locating them on the Cartesian plane.
2. Plot the points (x, y) given in the following table on the plane, choosing suitable unitsof distance on the axes.
x | -2 | -1 | 0 | 1 | 3 |
y | 8 | 7 | -1.25 | 2 | -1 |