Question

rationalise 1/root 5 -2​

Answer 1

Step-by-step explanation:

Solution

From Graham’s law, we have:

rate of effusion of hydrogen

rate of effusion of oxygen

=

√

1.43

g L

−

1

√

0.0899

g L

−

1

=

1.20

0.300

=

4

1

rate of effusion of hydrogen

Using molar masses:

rate of effusion of hydrogen

rate of effusion of oxygen

=

√

32

g mol

−

1

√

2

mol L

−

1

=

√

16

√

1

=

4

1

rate of effusion of hydrogen

Hydrogen effuses four times as rapidly as oxygen.

Answer 2

Answer:

1

Step-by-step explanation:

1/√5-2

1/√5-2*1/√5+2

1/√5²-2²

1/5-4

1/1 or 1