Akio just got over having the flu. His brother just got the flu. His parents are not worried about Akio getting it again because he built up an immunity to this flu strain. Which explains the type of immunity he built up?

Which of the following statements about the particles in a solution is true? A When an ionic solid mixes with water, its ions repel water molecules. B When a molecular solid mixes with water, the covalent bonds are broken.

Carla makes a small cardboard boat and floats it in a tub of water. When she adds a drop of dish soap behind the boat, the boat moves forward. Which statement best explains what happened? A.

When 0.313 g of Mg is heated strongly in a nitrogen (N2) atmosphere, a chemical reaction occurs. The product of the reaction weighs 0.433 g. Calculate the empirical formula of the compound containing Mg and N. Name the compound.

What is the potential danger from an accident at a nuclear power plant A) Fire and large scale explostions B) exposure to radiation C) Entire cities could be wiped out D) Meltdown of the plant and surrounding community

Given the reaction: HC2H3O2 (aq) + H2O ↔ H3O + (aq) + C2H3O2 - (aq) When the reaction reaches a state of equilibrium, the concentrations of the reactants 1. are less than the concentrations of the products 2.

A piece of iron can change in different ways. How is iron bending different from iron rusting?

Which organism would least likely be selectively bred A) Dandelions B) Nantes Carrots C) Belgian Blue Cattle D) Hypoallergenic Cats

You are given a clear solution of KNO3. Using 3-4 sentences explain how you would determine if the solution is unsaturated, saturated, or supersaturated

Which element combination (s) would result in electrons being shared? [] sodium (Na) and oxygen (O) [] carbon (C) and fluorine (F) [] oxygen (O) and hydrogen (H) [] aluminum (Al) and chlorine (Cl)

If you start with 4 moles of iron and 3 moles of oxygen to produce iron oxide, what is the limiting reagent? (You will need to balance the equation first.) Fe + O2 - > Fe2O3