375 years...my test is in 5 hours...can someone please just check my answer and if its wrong state the correct answer...i've been up all night...thanks
thanks hall of ivy...as for that below...
there are 4 half lives...making it 8 years correct?
The piece of wood starts with 32 g and eventually has only 2 g. It has 2/32= 1/16= (1/2)4 as much as originally. That means 32 is multiplied by 1/2 4 times. How many half-lives is that...
hallsofIvy you never seem to help people out...
anyways...n is the number of half-lives it has had...is that right Doc G or anyone else that is willing to help...
we haven't done logs...this is suppose to be a remedial math...I'm looking for someone to answer it properly so I use this question to study from...Can someone please help me out...
hey can someone help me out with this question...I have an test 2mr on this time and don't have any more time to waste. So can someone please show me how to do it...so I can study of it...thanks in advance
Scientist are able to determine the age of very old, naturally occurring items...
Hi guys...can someone help me out with this problem...
The population of Newfoundland and Labrador was 533,800 in 2001. At that time the population of Newfoundland was decreasing at a rate of 0.6% per year. The population of PEI was 138,500 in 2001. At that time the population was increasing...
the bob...read above...i'll post it below just in case u never saw it.
By definition the burning of methane to make CO2 and H2O is...
CH4 + 2 O2 --> CO2 + 2 H2O
The heat for this reaction is 2(-286.3) + (-393.3) -(-74.8) - 0 = -891.1 kJ.
right??
By definition the burning of methane to make CO2 and H2O is...
CH4 + 2 O2 --> CO2 + 2 H2O
The heat for this reaction is 2(-286.3) + (-393.3) -(-74.8) - 0 = -891.1 kJ.
right??
I don't have my textbook anymore...thats why I am asking up here..I finished school and handed in my textbook..this was a question of my grade 12 chemistry exam...i'm just curious...could someone please help me out...
Hi guys can you please check if this is right...thanks in advance
The heat released by the reaction 2C + 2H2 = CH4 is 74.8kJ/mol. Using this information and a table of standard enthalpy of formation values, determine the heat of combustion for the burning of methane to form CO2 and H2O(g)...
Hi guys can you please check if this is right...thanks in advance
Given the reaction CO2(g) + H2(g) = H2O(g) + CO(g). If initially there are 2.0 moles of CO2 (g) and 2.0 moles of H2(g) introduced into an empty 1.0L container, at 1800ºC, it is found that at equilibrium there are 0.3 moles of...
well i don't know...it was on my exam that i just had today..and i didnt know how to answer it...thats why I am soo curious...
can anyone please help me out..
chem question...curious?!
hi guys i was just wondering that if a solution of a weak acid has a salt of the same acid added to it, what would happen to the pH??
can anyone help me out...thanks in advance