Irene Curie and Frederic Joliott bombarded aluminum-27 with an ionized helium-4 cation(an alpha particle) yielding a neutron and an isotope. One of the end products was the antimatter of the electron. What is the name of the antimatter of the electron?

A. Position
B. Negitron
C. Proton
D. Nucleus
E. Antielectron

What layer of the atmosphere is directly above the troposphere?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .