What is the percentage of water by mass in CoCl2 × 2H2O? ​

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

In a reaction equation, where are the products located? a.) above the arrow b.) to the right of the arrow c.) to the left of the arrow d.) below the arrow

Rank the following four acids in order of increasing bronsted acidity : h2f+ , ch3oh, (ch3)2oh+ , ch3sh2+