1. When 30cm of an organic compound R of formula C, H3,0 was burnt in pure and excess oxygen and cooled to room temperature, 240cm of the residual gas was formed.
On addition of concentrated potassium hydroxide solution, the volume reduced to
180cm?
(a) (i) write the equation for the combustion of R
(ii) Determine the molecular formula of R

Aspirin has a density of 1.40 g/cm3 what is the volume in cubic centimeters of a tablet weighing 320 mg ?

Pls! plant cells and animal cells were observed under a microscope. the characteristics of two cells are listed below. cell p: does not capture sunlight cell q: has cytoplasm but no chloroplast which statement about the two cells is correct? cell q also has a cell wall. cell q also has large vacuole. cell p also has a large vacuole. cell p also has a cell membrane.

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.