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ooo looks hard :) thanks

Why exactly would you need to add HNO3? isnt addition of HNO3 just for the detection of carbonates

b)The question specifies chemical test so dont say like AAS, i guess you could add Cl ions (HCl) to precipate the lead into lead chloride

a)So In this water, it will contain both suspended solids and dissolved solids, the procedure to determine the concentrations of TDS is to filter out the suspended solids with filter paper then to evaporate the remaining water to obtain just the dissolved solids (ie how boiling salty water will...

Can someone confirm, im not great at perms and combs You make the mother a fixed seat as it is a round table so there are 5 seats left, and the father can sit on either seat beside the mother so (times 2) Excluding the mother, father, and Chelsea there are 3 people left which can occupy the seat...

Re: Official BOS Mathematics Trial Examinations: Spring Edition. Imma come! but ill probably fail :D

If there is a deficiency of electrons clearly the oxidation state would be positive, however for the oxidation state to change (increase/decrease) a change in the number of electrons of the species would have to occur

My physics teacher said that the board of studies were stupid and it should slow down even with slots

i went usyd today. so much walking D:

ill start next week :L

yea recently its fun but so bludgey

haha hey man! from macquarie fields ye? :p

Always say laminated iron core and iron ferrites

Thanks! so smart (y)

The answer is 864

i attempted to do that, and also included if there was just one woman, but i dont get the answer

In how many ways can 5 men and 5 women be arranged in a circle so that the men are separated? In how many ways can this be done if two particular women must not be next to a particular man? I need help with the second part :)

around 10 hrs per week on 4u

just got back results got 1/15 for last question hahaha

LOL yea! 10 bux hahaha. howd u go?