refer to the drawing above. a student is told to draw rutherford's model of the neutral carbon-12 atom what are two things the student did wrong and what should he have done instead?

the student must put the protons and neutrons together at the centre and electrons around the nucleus.

Explanation:

according to rutherfords model when he passed alpha particles through the gold foil most of the alpha particles went undeflected so he said that most of the space in atom is empty. and some alpha particles rarely deviated when passed through the centre of atom so he said that there is a heavy dense positively charged nucleus at the centre of atom and to maintain the neutrality there were electrons around the nucleus.

here the student therefore must put the positive charged protons and neutrons together at the centre as a whole nucleus and electrons around the nucleus dispersed.

3

explanation:

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%