Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Carbon-14 is a radioactive nucleus with a half-life of 5760 years. Living matter exchanges carbon with its surrounding (for example, through CO2) so that a constant level of 14C is maintained, corresponding to 15.3 decay events per minute. Once living matter has died, carbon contained in the matter is not exchanged with the surroundings, and the amount of 14C that remains in the dead material decreases with the time due to radioactive decay (1st order reaction). Consider a piece of fossilized wood that demonstrates 2.4 14C decay events per minute. How old is the wood? (Hint: ratio of the concentrations = ratio of decay rates)
How much aspirin can be made from 100.0 g of salicylic acid and 100 g of acetic anhydride? If 122 g of aspirin were obtained by the reaction, what is the percent yield?
A hydrated form of copper sulfate (CuSO4·x H2O) is heated to drive off all the water. If we start with 9.47 g of hydrated salt and have 5.29 g of anhydrous CuSO4
If 145 mL of 1.10 M KCl are diluted to 515 mL, what is the molarity of the final solution?
A 494 mL sample of hydrogen gas was collected over water at 25°C and a pressure of 753 torr. If the pressure of water vapor is 24.0 torr at 25.0°C, what mass of hydrogen gas (g) was collected? Do not enter units with your answer.
What volume of CO2 would be produced each day? Suppose the gas mixture produced by the decomposition is trapped in a container at 17 degree celcius
3 tons of ethanol are accidentally discharged into a lake. By how much is the biological oxygen demand of this water increased? Assume that all ethanol is transformed into CO2 and assume the lake contains 108 liters of water.
what is the molarity of a solution prepared by combining 125mL of 0.251 molar HCl with 250mL of pure water
State the conditions under which all derivatives of benzene like chlorobenzene, benzoyl chloride and chlorophenyl methane would react with sodium hydroxide.
added 5 mL of 0.10 M H2SO4 instead of 5mL 0.10 M of HCl calculate the ph of the solution using henderson-hasselbalch
Electrochemical cell potentials can be used to determine equilibrium constants that would be otherwise difficult to determine because concetnrations are small
Which compound accepts electrons from NADH, producing a compound that can pass through the inner membrane?
A camping lantern uses the reaction of calcium carbide, CaC2 (s) , and water to produce acetylene gas C2H2 (g) , and calcium hydroxide, Ca(OH)2 (s) . How many grams of water are required to produce 1.55 moles of acetylene gas
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd