If Kc = 0.450 at 40.°C and Kc = 0.635 at 90.°C, what is ΔH° for the reaction?

What gives the atoms of an element their chemical properties?

Which answer is a scientifically accurate description of velocity? Question 5 options: The car traveled 70 mph north to Atlanta on Interstate 75.

Which reaction represents the process of neutralization? Mg (s) + 2HCl (aq) MgCl 2 (aq) + H 2 (g) HCl (aq) + KOH (aq) KCl (aq) + H 2 O (l) C. Pb (NO 3) 2 (aq) + CaCl 2 (aq) Ca (NO 3) 2 (aq) + PbCl 2 (s) D. 2KClO 3 (s) 2KCl (s) + 3O 2 (g)

A student has two compounds in two separate bottles but with no labels on either one. One is an unbranched alkane, octane, C8H18; the other is 1-hexene, an unbranched alkene, C6H12.

Hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6).

What is the study of matter called? O A. Chemistry O B. Philosophy O O C. Biology D. Physics

Molality is a unit of concentration that measures the moles of solute per liter of solution. liter of solvent. kilogram of solution. kilogram of solvent.

What evidence do you have that the slope of the natural logarithm plot will be the same for all ions of the same charge, and not just for the ions you investigated?

How many Oxygen elements are in a carboxylic acid

The number of protons in the nucleus Of an Atom is equivalent to which of the following