The mass of an object:

a.is 0.1 kg if it weighs 98 N at g=9.8 m/s^2..
b.is 10kg if it weighs 98 N at g=9.8 m/s^2.
c.of an object is 1kg if it weighs 98 N at g=9.8 m/s^2.
d.is 100 kg if it weighs 98N at g=9.8 m/s^2.

Question

The mass of an object:

a.is 0.1 kg if it weighs 98 N at g=9.8 m/s^2..
b.is 10kg if it weighs 98 N at g=9.8 m/s^2.
c.of an object is 1kg if it weighs 98 N at g=9.8 m/s^2.
d.is 100 kg if it weighs 98N at g=9.8 m/s^2.

aaronq · Answer

$F=ma$

$F=98N=m(9.8/ms^2)$

$1~N=1~kg*m/s^2$

$m=\dfrac{98~N}{9.8~m/s^2}=\dfrac{98~kg*m/s^2}{9.8~m/s^2}=10~kg$

calculusfunctions · Answer

As @aaronq  said:

Weight = mass X acceleration due to gravity 

In other words,

W = mg