The halogens, the elements of family 17 on the periodic table, combine easily with elements from family 1. when a halogen reacts with a metal, what type of compound is formed?
1.potassium 2. alloys 3.noble gas 4.salt

Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that

Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]

What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?