If a substance changes color, what has most likely happened

How is flowing rock different from flowing water?

Hydrogen is a reactive gas under normal conditions. Based on this property alone, to which group of the periodic table should hydrogen belong? why?

Which is right regarding atoms? a) Atoms can be broken down by chemical reactions. b) Every atom of an element is identical c) Atoms can join form a new substnace d) Atoms are not formed of smaller particles I think it is A, but I am not 100% sure.

What are the products of the neutralization reaction H Br + Ba (OH) little 2

Given the equation 2CH4 S8 - -> 2CS2 4H2S Calculate the moles of H2S produced when 1.5 mol S8 is used.

If you get pregnant in Dec how long will it take for u to get to second trimester

Name the following compound HClO

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.