Abbi Secraa - Green Bikini

Katarina Hartlova - Rockstar

Busty Katarina Hartlova is a sexy Rockstar.

Milena Velba - Big Boobs in the sun

Mandy Majestic - Romancing the cucumber!

Genital Hospital feat. Elaina Gregory

Nadine Jansen - Running In The Rain

terri jane and michelle oil fun

Busty big areolas lactating

Kerry Marrie on the bed

Busty Kerry Marie lies with leopard lingerie on her bed before she fetches out her huge BIG BOOBS.

Milena Velba oils her huge Tits

Sexy Venera shakin tits

Busty Merilyn clean the kitchen

Huge Big Tits under suspenders. That's one of my favourites. And Busty Merilyn has the perfect tits for this.

Beshine- Fake tits huge cleavage

Busty Terri Jane in the meadow

Busty Terri Jane in a skinny hot red dress in the meadow. She shows her perfect huge BIG BOOBS and her round ass.

#6

H2N2O2(HO-N=N-OH)
+
H4SIO4(SI(OH)4)
H₂O + H₂OSO₄
H3PO3(HPO(OH2))
H₂SO₄ => SO₄
H₂OSO₄ = H

Chemistry – A-level/undergraduate level

This is a frustratingly inconsistent approach to writing chemical formulae. On the one hand the teacher has gone to the trouble of also using structural formulae to improve clarity (eg H₂N₂O₂ could be nitramide, but the addition of HO-N=N-OH makes it clear that we are dealing with hyponitrous acid here), but then writes SI (sulphur iodine) instead of Si (silicon) in the formula for orthosilicic acid. This, combined with not using subscripts for many of the numbers, could lead to a great deal of confusion.

Whilst this lesson appears to be aimed at quite a high level, such elementary errors may affect comprehension.

5/10 - rather sloppy.