1. If you have 20 grams of parent material and TWO half-lives go by, how much parent material do you have remaining? How much daughter material do you now have?

What is the ideal gas constant? A. It is a universal constant used for all gases. B. It is a constant that applies only at STP. C. It is a specific constant for a particular gas. D. It is a constant that depends on the conditions.

Compare the wavelengths of infrared waves, ultraviolet light, and visible light.

What creates the van allen belts a. earths gravity b. deflection of charged particles c. aurora borealis d. convection in the mantel?

If a substance changes color, what has most likely happened

The longer the reaction time is, the the reaction rate is. Reaction time is to reaction rate.

Aluminum and Oxygen gas will react to form Aluminum Oxide (Al2O3). When the equation is balanced, How many moles of Al2O3 are formed when a mixture of 0.36 moles Al is ignited? a. 0.12 b. 0.18 c. 0.28 d. 0.46

Which state of the West produces the widest varieties of fruits, vegetables, and nuts? A) California B) Colorado C) Wyoming D) Alaska

A chemical engineer for a fertilizer company is determining the most efficient way to produce ammonia. the engineer carries out the haber reaction under four different conditions.

What type of Bond exist in a molecule of hydrogen Iodide

Which common material is an example of a polyamide?