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Problem- Two radioactive isotopes of iodine used for the diagnosis and treatment of thyroid disease have mass numbers of 123 and 131. For each isotope, give the following information: (a) the number of protons; (b) the number of neutrons; (c) the number of electrons in the neutral atom; (d) the group number.
I am stuck in between this question please help me out
What substance is produced at the anode during the electrolysis of a mixture of molten calcium bromide, CaBr2(l), and molten magnesium iodide, MgI2(l)? Assume standard conditions
Set of quantum numbers listed in the form: (n,l,ml, ms). for each set of quantum numbers, indentify the corresponding orbital (1s, 2s, 3s....etc) if not allowed say not allowed.
a litre of solution containing 0.1 m of ch3cooh and 0.1 m of ch3coona provides a buffer of ph 4.74 . calculate the ph
Hydrogenation reactions are used to add hydrogen across double bonds in hydrocarbons and other organic compounds. Use average bond energies to calculate DELTA Hrxn for the following hydrogenation reaction
A dark glass bottle of chemicals is found in cleaning out an old basement. Part of the label has been eaten away with age. Only the last part of the label is readable.
a solution of malonic acid h2c3h2o4 was standarized by titration with 0.1000m naoh. if 20.76ml of the naoh solution
What is the concentration of Br- (aq) in a solution prepared by mixing 75.0ml of 0.62M iron (III) bromide with 75.0ml of water? Assume volumes are additive.
according to the following reaction how many moles of ethane c2h6 will be formed upon the complete reaction of 28.8
What modification occurs when a small amount of p-divinylbenzene is added to the reaction mixture during the polymerization reaction of styrene to form polystrene
Problem-The elemental composition of lactic acid is 40.0% carbon, 6.71% hydrogen and 53.29% oxygen, and has a molecular mass of 90.0 g/mol. What is the molecular formula of lactic acid
0.755 mole of bismuth oxide reacts with an excess of carbon to form bismuth metal according to the following reaction: Bi2O3(s) + 3 C(s)-> 2 Bi(s) + 3 CO(g) How many moles of Bi form?
To verify Boyle's Law using the relationship between gas volume and gas pressure when the amount of gas remains constant at certain temperature.
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