The mixture of acids and sample is heated in an uncovered beaker for 1 h on a hot plate having a surface temperature of 200 C.
(The mixture of acids and sample; is; heated; L:in an uncovered beaker) (a hot plate; having; a surface temperature of 200 C.)
The mixture of acids and sample a hot plate
is having
heated L:in an uncovered beaker
a surface temperature of 200 C.