If a mineral has a metallic shine and scratches, which of its properties are being measured? Choose the two correct answers.

What is the formula that this ionic compounds could form sr2+p3-o2-

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.