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6-An element M reacts with chlorine to form MCL2 and with oxigen to form MO2 and with nitrogen to form the most likely candidate for the element is (a) LI (b) Mg (c) Al (d) SI 7- which species does not have an octet of electron for its outer core? (a) c4- (b) P3+ (c) O2- (d) MG+ 8- An element that has the valence electron configuration 3S23P3belongs to which period and groupd (a) period 3; group 3A (b) period 3; group 5A (c) period 4; group 3A (d) period 4 ; group 5A
The initial temperature of the cold water was 21.00C and of the hot water, 29.15C. The maximum temperature of the mixture was found to be 24.81C. Assume the density of water is 1.0g/ml and the specific heat 4.184J. Determine the temperature change..
Calculate the pH of a solution resulting from mixing together the following: a) 37ml of HCL 0.1M+33ml of NaOH 0.03M b) 55ml of HNO3 0,7M+88ml of KOH 0.8M c) 170 ml of H2SO4 0,44M_29ml of NaOH 1.2M d)76 liters of HBr 0.01M+2 liters of Mg(OH)2 2.1M.
calculate the Al(III) concentration in the original unknown solution by correcting the dilution made when preparing the sample for analysis.Given: 10 mL unknown solution
How many grams of carbon dioxide would be obtained from the burning of 92g of ethanol in oxygen?
If the x-component of the velocity of an electron can be measured only to a precision of , what is the minimum uncertainty of the position of the electron in the x-direction. ( )
if a lighter contains 2.5 ml of liquid butane den 0.8 gcm3 how much potential energy does the lighter contain
Write net Bronsted equations and determine the equilibrium constants for the acid-base reactions that occur when aqueous solutions of the following are mixed.
the cancer drug cisplatin contains 65% platinum. if you have 1.53 g of compound, how many grams of platinum does this sample contain
A flask contains 0.120 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
The Eu(III) standards added to the groundwater sample contained 0.181 ng/mL (ppb) of Eu(III). Calculate the concentration of Eu(III) in the groundwater sample.
Use tabulated thermodynamic data to calculate ?S° for the reaction: PbO2(s) + 2Ni(s) ? Pb(s) + 2NiO(s)
If 1.35g of AgNO3 is dissolved in 115 mL of water, and to this solution is added 5.00 mL of 1,45M HCl resulting in the formation of a precipitate. Find the concentration of silver ions remaining in the solution.
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