Answers created by Vijay Raghavendran

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• Integral (sin t dt)/(25 + cos^2 t)?
  
• The count in a bacteria culture was 400 after 15 minutes and 1400 after 30 minutes. Assuming the count grows exponentially, initial size of the culture (rounded to 2 decimals)? doubling period.? population after 120 minutes? When population reach 10000?
  
• Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 9.50 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C? Use CP= 30.8 J/(K·mol)
  
• Calculate the osmolarity if the 1L solution Containing ? 1. 10 mM albumin 2. 5mM NaCl
  
• A bacterium with completely non-radioactive DNA was allowed to replicate in a radioactive medium for three generation what % of the bacteria should contain radioactive DNA?
  
• How many joules of heat must be added to a 2 kg sample of methanol for it to boil?
  
• The equilibrium constant #K_c# for the reaction #N_2(g)# + #3H_2(g)# #rightleftharpoons# #2NH_3(g)# at #450^oC# is 0.159. What is the equilibrium composition when 1 mol #N_2# is mixed with 3 mol #H_2# in a 2.00-L vessel? Thank you so much!
  
• Please help me on this too a) 9.80g of water vapor condenses on a soda can at 100.0°C. Given: latent heat of vaporization 2260 J/g latent heat of fusion 334 J/g (ii) Calculate the amount of energy transferred?
  
• I'm currently trying to complete a lab report of finding out the concentration of glucose in a honey sample using a chemical and enzymatic assay. I'm currently trying to work out what to plot the graph as, absorance against glucose %/concentration/uL?
  
• 3.3 grams of CO react with oxygen to produce carbon dioxide. write AND balance the equation for this reaction. then calculate how many grams of carbon dioxide can be produced. so what is it?
  
• How many grams of oxygen can be produced if you have 5.0 grams of KCLO3 in the following reaction? 2KCLO3 -> 2KCL + 3O2
  
• How many pints of each 2 percent and 7 percent acid solutions must be mixed to obtain 50 pints of a 5 percent solution?
  
• How does linear regression work in Excel 2013?
  
• A salt solution has a concentration of 2.4%w/v. What is the concentration if 10.0 mL of this solution is diluted to a total volume of 60.0 mL?
  
• Question #30788
  
• If 525 mL of 0.80 M HCl solution is neutralized with 315 mL of Sr(OH)2 solution what is the molarity of the Sr(OH)2? __ HCl + __ Sr(OH)2
  __ SrCl2 + __ H2O
  
• Why is titration used when standardizing a solution?