Why is a bush or tree a more accurate then a line to describe how hominds developed into modern humans

Given the equation I2 (s) + 62.4kJ - - > I2 (g), which of the following is true: A) The reaction is exothermic B) H = + 62.4kJ C) H = - 62.4kJ D) The reaction releases heat

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned? Constant Density Calorimeter Constant Temperature Calorimeter Constant Volume Calorimeter Constant Pressure Calorimeter

What model is the basis for chemistry? A) Virchow's model B) Bohr's atomic model C) Schwann's cell theory D) exponential growth and decay model

What is the role of an organism in an community

Biphenyl, C 12 H 10, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C 6 H 6. C6H6. At 25 ∘ C, 25 ∘C, the vapor pressure of pure benzene is 100.84 Torr. What is the vapor pressure of a solution made from dissolving 19.0 g 19.

What is the gram formula mass of Na2CO3 multiplied by 10H2O

Why are elements organized in the same group or families

Iron Man died in Infinity Wars, so Mrs. Nogaki has decided that she is going to make her own super hero suit to save the world. She has decided that her suit must have these properties.

How many atoms of oxygen are there in one molecule of carbon dioxide, if the chemical formula is CO2? 0 1 2 3

The speed of a chemical reaction a. is constant no matter what the temperature is. b. is independent of the amount of contact surface of a solid involved. c.