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Problem- A 0.0106-g sample of a radioactive isotope with a half life of 1.3x10^9 years decays at the rate of 2.9x10^4 disintegrations per minute. Calculate the molar mass of the isotope.
I just need a general explanation of it please- Thanks!
The pH of a solution of a weak acid is found to be 4.625. If 10.000 mL of this solution is titrated with 7.3990 mL of 0.012500 M NaoH, what is the Ka of this acid
What is the longest wavelength of radiation with enough energy to break carbon-carbon bonds
Write a nuclear equation to describe the spontaneous fission of 244 Am 95 to form I-134 and Mo-107. Determine how many netrons are produced in the reaction
A dose of aspirin is 5.0mg/kg body weight has been prescribed to infant that weighs 8.5lbs. How many miligrams is needed.
using a sample of a compound containing only oxygen and chlorine reacts with an excess of h2 gas to give 0.206 g
You would like to create a reflection grating like the one shown at the right with an incident angle (?) of 41°. Compute the number of lines per centimeter that must be etched in the grating for each of the following conditions:
the indicator phenolphthalein is used in this lab and changes from colorless to red at ph around 9 when a base is
Problem- How many moles of HCl must be added to 100 mL of a 0.100 M solution of methylamine (pKb = 3.36) to give a buffer having a pH of 10.0
Observe while adding 0.5 mL of 6M HCl to 1 mL samples of the anion solutions and then add 5 drops of 0.1M barium nitrate and observe again.
A volume of 5.0 mL of solution of sodium carbonate was analyzed and found to contain 6.34x10^-4 moles of carbonate ion. Calculate the molarity of sodium carbonate in the solution.
What is the Cu2+ concentration at 25*C in the cell Zn (s) I Zn2+ (1.0M) II Cu2+ (aq) I Cu(s)? The cell potential is 1.04 V. The standard cell potential is 1.10 V.
The absorption of a solution that contains chromium (III) ions shows two maxima, one at about 400nm and the other at about 575nm
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