Which of the following is a FALSE statement? 1. Heat Heat moves moves through through solids solids by by conduction. conduction.
2. Molecules Molecules move move faster faster in in warmer warmer substances. substances.
3.Warm Warm water water is is denser denser than than cold cold water. water.
4. Heat Heat moves moves through through liquids liquids and and gases gases by by convection. convection.

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

Compare and contrast physical changes with chemical changes.

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.