What is the value of ∆H for NH4NO3 dissolution from your experimental result? Compare it to the accepted value of +25.4 kJ/mole . How would you modify the experimental design to improve the accuracy of the result? Discuss at least one modification.

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

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table