Answer:
density = 7.55 g/cm^3
Explanation:
we need to get the volume first to get the density , and the volume formula is:
the volume = area * thickness
where :
area = 2 cm * 2 cm = 4 cm^2
and thickness = 100 cm
by substitution:
the volume = 4 * 100 = 400 cm^3
where
density = mass / volume
we have to convert mass from kg to g = 3020 g
by substitution:
density = 3020 g / 400 cm^3
= 7.55 g/cm^3
The solution for this problem would be:
H + ions from pH = 4.0 x 10^-4 moles.
But H2SO4 gives off 2 moles of H+ ions / mole.
Moles of H2SO4 = 2.0 x 10^-4
Mass = 2 x 10^-4 moles x 98 = 1.96 x 10^-3 grams
1.96 x 10^-3 grams / 10^3 = 1.96 x 10^-6 Kg.
Answer:
I think it's nitrogen I'm not really sure..