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Calculate the percent mass of nitrogen in ammonium carbonate (NH4)2CO3 Use: 7N14, 1H1, 6C12 and 8O16

Which noble gas configuration (short hand notation) is correct for 49In115 (Indium)?

Commercial grade HCl solutions are typically 39.0 % (w/w) HCl in water. Determine the molarity of the HCl, if the solution has a density of 1.2 g/mL. 

Determine the type of solid for each of the following compounds respectively MgO,  Cu,  CO2

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of NO2 (g). N2O4 (g) ⇌ 2NO2 (g)                 Kc = 0.21, [N2O4]eq = 0.039 M

Choose the correct enthalpy change, ΔH° and heat transfer for the following reaction             C 3H 8(g)   5O 2(g)    →    3CO 2(g)   4H 2O(l)  ΔH°f (kJ/mol)    -103.85   0.00     -393.50   -285.80

A very large nucleus tends to be unstable because of the

The [SO42-] in a saturated solution of PbSO4is (Ksp= 1.1 x 10-8)

An alpha particle is a ……………… nucleus

Will PbI2 precipitate when the Mixture 2 solutions (10 mL 0.01 M Pb2+  + 5 mL 0.01 M I- in 35 mL water) are combined? Ksp for PbI2 is about 10-8                                              PbI2(s)  ↔  Pb2+(aq)  +  2I-(aq) Choose (A) or (B)