PLEASE HELP! 1. There are four stages in the conversion of sulphur into sulphuric acid.
Stage 1: Sulphur is burnt to make sulphur dioxide.
Stage 2: Sulphur dioxide is oxidised to sulphur trioxide (the Contact Process).
Stage 3: Sulphur trioxide is dissolved in sulphuric acid to form oleum.
Stage 4: Oleum is diluted with water to form concentrated sulphuric acid.
(a) State the catalyst and give the equation for stage 2 (the Contact Process).
[3]
(b) Calculate the mass of sulphur needed to make 196 kg of sulphuric acid.
[3]
(c) Give two uses of sulphuric acid.
[2]
(d) Describe what you would see and name the products formed when dilute sulphuric acid reacts
with magnesium carbonate.
[2]​

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.  

sup bro, im dumb, but this is what i found xd

"the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface"