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!
A particular element exists in two stable isotopic forms. One isotope has a mass of 34.9689 amu ( 75.77% abundance). The other isotope has a mass of 36.9659 amu. Calculate the average mass of the element and determine its identity.
A solid object is made of two materials, one material having density of 2.4 g /cm3 and the other having density of 8.6 g/cm3. If the object contains un-equal masses of the materials (75/25), what is its average density
describe the change in conductivity as the concentration of the NaCl solution was increased by the addition of NaCl drops
Determine the theoretical yield and percent yield if 21.8g of K2CO3 is produced by reacting 27.9g KO2 with 29.0L of CO2 (one mole of CO2 occupies 22.4L). The GFW (KO2)= 71.10 , GFW (K2CO3)= 138.21 , GMW (CO2)= 44.01
Sodium thisulfate, Na2S2O3, is used as a fixer when developing photographic film. What is the mass in grams of Na2S2O3 needed to make 100ml of a 0.25 solution?
Americium-241 is used in smoke detectors. It has a rate constant for radioactive decay of k = 1.6x10-3yr-1. What is the half-life of this isotope in years? Give your answer to 3 significant figures.
If the sun is a distance of 1.5 x 10^8 km from earth, how many minutes does it take sunlight to reach earth if light travels at 186,000 miles each second
Draw all resonance structures for anisole to show why the methoxy group directs incoming electrophiles
calculate the pH of 50 ml of .15 M HCHO2 with 75 mL of .13 M NaCHO2
A mixture of MgCO3 and MgCO3·3H2O has a mass of 3.057 g. After heating to drive off all the water the mass is 2.790 g. What is the mass percent of MgCO3·3H2O in the mixture.
2 mL of 1,2-dichlorobenzene was added to a 250 mL volumetric flask, then it was diluted to 250 mL with benzene. A capacitance cell was submerged into this solution, then the cell was attached to a frequency counter. The frequency response was meas..
Ascorbic acid (vitamin C, C6H8O6) is a diprotic acid (Ka1 = 8.00x10^-5 and Ka2 = 1.60x10^-12). What is the pH of a 0.280 M solution of ascorbic acid
Write down the second period elements (ie. lithium through neon), on order of increasing first ionization energy and Write the electron configuration for a gallium atom.
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