How many moles are present in 85.34 grams of sodium

How do you know when a chemical reaction has occurred

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.