calculus
Hi sasha, Let me explain the methods step by step : a)3x^2 ln(2x) For this question, product rule must be applied : uv = udv/dx + vdu/dx where u = 3x^2 & v = ln(2x) Differentiate u, du/dx = 6x(I'm sure you know the basic differentiation) Differentiate v ,dv/dx = 2/2x = 1/x...
Math - Please help
Hi Christopher, Let me explain the method of solving this problem: Given the area of the ring = 2123 ft^2 The formula for area is pi*r^2, where r is the radius Therefore,we need to find the r based on the area given 2123 ft^2 = pi*r^2 (work this out using calculator) r^2 = (21...
math
Hi Teresa, Always remember: ln x = loge(log base e)x log x = log10(log base 10)x Example : ln x = 2 loge x = 2 x = e^2 log x = 5 log10 x =5 x = 10^5 (Hope this two examples have given you a rough understanding) ln(x-4) = -3 ln(x-4) = loge(x-4),right? loge(x-4) = -3 We need to ...
Separation process
Oil used to absorb benzene from gas is to be stripped with steam at P = 1atm to recover the benzene.Equlibrium at the operating temperature is approximated using Henry's Law.When the oil contains 10%mol of benzene,the oil's partial pressure is 5.07kPa.The oil is nonvol...
Chemistry
Hi Dr.Bob, Which is the correct formula for dinitrobis(ethylenediamine)cobalt(III) nitrate? I'm not sure which is the correct one out of these two: a)[Co(en)2(NO2)2]NO3 or b)[Co(NO2)2(en)2]3(NO3)3 ? At the instance, I've choosen option a). Is my naming correct?
Chemistry
When 6200g of ethylene glycol and 16600g terephtalic acid reacted completely to generate poly(ethyleneterephtalate)(PET),how many grams of H20 generated? My working: mol of ethylene glycol = 6200g/(62g/mol) = 100 moles mol terephtalic acid = 16600g/(166g/mol) = 100 moles So,bo...
Chemistry
Thank you Dr.Bob & sorry for the inconvenience caused to you
Chemistry
Arrange these acids in terms of increasing acidity: CH3COOH, NH3+CH2COOH, CH3CONHCH2COOH Dr.Bob asked me what NH3+CH2COOH is.NH3+CH2COOH is obtained when 1 mol of glycine is added with a very strong acid,which results in both the amino & carboxyl groups to be fully protonated....
Chemistry
Ok,that NH3+CH2COOH is obtained when 1 mol of glycine is added with a strong acid,which results in both amino & carboxyl groups to be fully protonated.
Chemistry
Dr.Bob, Arrange these acids in terms of increasing acidity: CH3COOH, NH3+CH2COOH, CH3CONHCH2COOH According to my Chem textbook,NH3+CH2COOH has a low pKa value since both the COOH & NH3+ are protonated,so it is most acidic. CH3COOH is a weak acid, but I'm not sure about the...
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