A student determines the density of an irregularly shaped block of lead in the laboratory. The displacement volume measured 25.2 mL using a graduated cylinder. The mass on the electric balance reads 285.768 g. What is the density of lead reporting to the appropriate number of significant figures allotted by the equipment used?

Why is it illegal to manufacture fireworks without a license

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. 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

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true