Use the table below to answer the questions that follow.
thermodynamic quantities for selected substances at 298.15 k (25°c)
substance δh°f (kj/mol) δg°f (kj/mol) δs (j/k-mol)
carbon
c (s, diamond) 1.88 2.84 2.43
c (s, graphite) 0 0 5.69
c2h2 (g) 226.7 209.2 200.8
c2h4 (g) 52.30 68.11 219.4
c2h4 (g) -84.68 -32.89 229.5
co (g) -110.5 -137.2 197.9
co2 (g) -393.5 -394.4 213.6
hydrogen
h2( g) 0 0 130.58
oxygen
o2 (g) 0 0 205.0
h2o (l) -285.83 -237.13 69.91
the value of δs° for the catalytic hydrogenation of ethene to ethane, c2h4 (g) h2(g) → c2h6 (g)

Alarge marble is dropped in a graduated cylinder with 35ml of water in it.the water level increases to 49ml.what is the volume of the marble

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

0.2348 grams of pbcl2 used to form 44.0 ml of solution.