Which statement best describes the use of a catalyst in a fuel cell? It reduces waste. It lowers energy requirements. It reduces toxic exhaust. It increases reaction rates.

Which is the formula for iodine tribromide? IBr IB3 IBr3 I3Br

Which type of gas is filled in lays pack and why?

If 0.0526 mol CaCl 2 is dissolved in water to make a 0.110 M solution, what is the volume of the solution? V = mL

Why did Becquerel expose uranium crystals to sunlight in his initial experiment? He wanted to show that warmed crystals radiate heat. He wanted to show that the crystals emit X-rays.

How do carrier proteins recognize substances to transport in active transport? a. They will allow any substance to pass. c. They have a pore that only the substance will fit through. b. They have a specific binding site for the substance. d.

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).

What compound will not give oxygen on heating

Choose one property of water that makes it unique. Describe the property and explain the chemical or physical?