When you add magnesium metal and hydrochloride acid will it be a physical or chemical change? explain why.

Consider the nuclear equation below. 239 > x + 4 he 94 2 what is x? 1.235 cm 96 2.243 u 92 3.235 u 92 4.243 cm 96

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.