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emma used an equal arm balance to weigh a 1.134 g sample of calcium carbonate. which of these measurements made by emma is the most accurate?

1.1 g
1.2 g
1.3 g
1.4 g

When you perform this reaction, what could remain at the end of the reaction? check all that apply. excess reactant aqueous copper chloride excess reactant aluminum oxygen product solid copper carbon dioxide product aqueous aluminum chloride water

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Which of the following nuclei would be the least stable a 2 protons, 2 neutrons b 1 proton 1 neutron c 1 proton 3 neutrons d 1 proton 2 neutrons