How many moles of aluminum (Al) are required to produce 4 moles of hydrogen (H2)?

An aqueous solution of potassium hydroxide is standardized by titration with a 0.194 m solution of hydrobromic acid. if 25.2 ml of base are required to neutralize 24.2 ml of the acid, what is the molarity of the potassium hydroxide solution? m potassium hydroxide

Starch and are common polysaccharide carbohydrates found in plants. sucrose glycogen fructose cellulose

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons