bertie

Questions and answers by visitors named bertie

Questions (12)

Hi,Can someone please help??? looking for the empirical formula for Aliminium selenide if Se has a valency of -2 and aliminium
1. 1 answer
2. 410 views
got another question for DrBob please?The composition of hydrogen selenide can be determined by heating tin (Sn) in a measured
1. 1 answer
2. 537 views
Can anyone please help?ive been asked to write a balanced chemical equation for the breakdown of seleniuos acid H2SeO3 in water
1. 1 answer
2. 475 views
Dr bob,Thanks, i understand that, at last! But wot if im asked to calculate when it is given as words? would it still be the
1. 1 answer
2. 526 views
Hi,how many moles does 0.225g of oxygen atoms represent? If 1 mole of oxygen atoms represents 16.0g? Thanks mols = grams/molar
1. 1 answer
2. 788 views
Hi,Can anyone please tell me how to convert cm3 into litres? Thanks ;) worked it out! Cheers ;)
1. 1 answer
2. 327 views
Hi,Is the molecular formula different when it is in a gaseous state? Cheers ;) Sometimes yes, sometimes no. H2O, for example, is
1. 1 answer
2. 534 views
me again!got a question that really is trying! the isotope of ununhexium Uuh and it undergoes a succession of seven a-decay
1. 1 answer
2. 625 views
hi,Can you please double check to see if i have got this right? Is the empirical formual for oxide of arsenic As2O5? Cheers ;)
1. 3 answers
2. 641 views
can anyone help please???im asked to explain the meaning of glycosidic C1 - C4 Linkage. Im not 100% clear on it!! Any ideas??
1. 1 answer
2. 615 views
hi,can anyone plz help? im asked to work out the gradient of a straight line, which i understand fine. Its which units to use
1. 1 answer
2. 484 views
hi,Can anyone plz advise me if this is the correct ballanced equation for CH4+NH3+O2 - HCN+H2O Answer: CH3+NH2+O1 - H3N+H2O1 Is
1. 1 answer
2. 404 views