How many moles of H2 can be formed if a 2.78 g sample of Mg reacts with excess
HCl?

Based on the equation and the information in the table, what is the enthalpy of the reaction?

What is the independent variable in this investigation? mass volume sample number substance density

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons