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1-A 1.0-L buffer solution is 0.105M in HNO 2 and 0.145M in NaNO 2. Determine the concentrations of HNO 2 and NaNO 2 after addition of 1.4g NaOH .Express your answers using three significant figures separated by a comma.
2- A 1.0-L buffer solution is 0.105M in HNO 2 and 0.145M in NaNO 2. Determine the concentrations of HNO 2 and NaNO 2 after addition of 1.4g HI. Express your answers using three significant figures separated by a comma.
3- Which processes are nonspontaneous?a bike going up a hilla meteor falling to Earthobtaining hydrogen gas from liquid watera ball rolling down a hill
4-predict the sign of ΔS sys for each chemical reaction. ΔS sys >0 or ΔS sys <02KMnO 4 (s)→K 2 MnO 4 (s)+MnO 2 (s)+O 2 (g)CH 2 =CH 2 (g)+H 2 (g)→CH 3 CH 3 (g)Na(s)+1/2Cl 2 (g)→NaCl(s)N 2 (g)+3H 2 (g)→2NH 3 (g)
5-Why does a gas have greater entropy than the corresponding solid? Choose from:
The entropy change of sublimation (solid going directly to gas) is positive.There are more available types of kinetic energy in a gas. In a solid, the molecules can only vibrate.A gas expands to fill its container, while a solid maintains a constant shape.Particles in a solid move slower than in a gas.
Draw a diagram showing the stratification in a body of water. Label the different layers and describe the type of chemistry (and species) that occurs at each level.
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Determine what is the exact volume of the 250-mL Erlenmeyer flask express your answer (in mL)?
Europium (Europium is a chemical element with the symbol Eu and atomic number 63 )crystallizes in a body-centered cubic lattice compute the unitcell edge length in pm if The density of Eu is 5.26 g/cm3..
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The reported values for one compound (CaHbOc) were as follows: mass: 214.1360 g/mol; percent C and H: 84.07 and 8.47, respectively. Determine the molecular formula of the compound.
Calculate the molecular weight of this gas if A sample of gas weighs 0.250 g and occupies a volume of 112 cm3 at STP?
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What is the fraction of NTA present after HT2- has been brought to equilibrium with solid PbCO3 at pH 7.00, in a medium in which [HCO3-] = 1.00E-3 M?
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