A student reacts Mg and HCl together. The product of this reaction is H2 gas and MgCl2. The balanced equation for this reaction is Mg + 2HCl → H2 + MgCl2
If I need to create 50 L of H2 how many moles of HCl should I start with?
a) 2.3 mol HCl
b) 4.5 mol HCl
c) 1.1 mol HCl
d) 44.6 mol HCl

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

What is the reaction between an acid and a base

How is it possible for someone to put an ear to a wall and hear someone in the next room?     a.sound waves can travel though solids.    b.the waves travel from room to room via air.    c.there must be some air in the wall so the sound can travel through it.    d.sound waves change to electromagnetic waves and then back again.