How do fireflies light

1. Classify each of the following as a homogeneous or heterogeneous substance. a. iron ore b. quartz c. granite d. energy drink e. oil-and-vinegar salad dressing f. salt g. rainwater h. nitrogen

How old is a piece of wood that has 0.7813% of the carbon-14 of a living organism

What is the chemical formula for Fluorine trisulfide?

What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M) must be diluted to 200.00 mL to make a 1.50 M solution of sodium hydroxide?

A solution has [OH-] of 1x10^-2, what is the pOH of this solution

A solution is prepared by mixing 50.0 ml of 0.50 m cu (no3) 2 with 50.0 ml of 0.50 m co (no3) 2. sodium hydroxide is slowly added to the mixture. which precipitates first? [ksp (cu (oh) 2) = 2.2 * 10-20, ksp (co (oh) 2) = 1.3 * 10-15]

What does it mean when a mineral has a definite chemical composition? Select 2 choices. It always occurs in pure gorm. It always contains certain elements. It cannot form from living or once living materials.

During Trial 2, what allowed you to determine that aluminum was the limiting reactant? Check all that apply. All of the copper dissolved. The solution turned clear All of the aluminum dissolved.

49.7 mL of a solution of NaOH is needed to neutralize a solution that contains 1.86 g of H2504 in 20.00 mL of water. What is the molarity of the NaOH solution? H2SO4 + 2 NaOH - -> 2H2O + Na2SO4 1) 0.763 M 2) 0.0404 M 3) 1.13 M 4) 0.481 M 5) 0.

Which of the following is true about lonization? The ionic substances donate some of their atoms to the solvent. The covalent substance breaks apart into ions. The ionic substance breaks apart into ions.