Chemistry, 16.07.2019 22:00, janeou17xn
Miners discover a new vein of metal in the mine they are excavating. they send a sample to your lab so you can determine what type of metal it is. you heat up a 2 kg block of the unknown metal from room temperature of 298 k until it melts at 1768 k. you measure that it takes 1.24 x 10^6 j of energy to melt the block. use the specific heats of various metals shown below to determine what metal the miners have discovered. aluminum: 904 j kg-1 k-1 nickel: 445 j kg-1 k-1 copper: 384 j kg-1 k-1 cobalt: 421 j kg-1 k-1 titanium: 520 j kg-1 k-1 a. cobalt b. copper c. aluminum d. nickel
Answers: 1
Chemistry, 22.06.2019 21:00, lucyamine0
As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.
Answers: 1
Chemistry, 22.06.2019 23:00, poolwaterisgross
How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.
Answers: 1
Chemistry, 23.06.2019 09:20, annapittbull12
1) a. water molecule breaks up into hydrogen and oxygen on passing electricity. does this involve breaking intermolecular or intramolecular forces of attraction. explain b. on boiling water changes to water vapor. does this involve breaking intermolecular or intramolecular forces of attraction. explain methanol evaporates faster than water. contrast the intermolecular forces and the vapor pressures of methanol and water?
Answers: 2
Miners discover a new vein of metal in the mine they are excavating. they send a sample to your lab...
History, 29.03.2021 18:40