When you mix chemicals and the color changes is that a chemical reaction?

What is the formular for dichlorine trioxide

Will there be a precipitate for the following reaction? Aqueous zinc chloride + aqueous sodium carbonate A. No B. Yes, there will be one precipitate. C. Yes, there will be two precipitates. D. Yes, there will be three precipitates.

Which is an example of a container filled with a pure substance? * a glass of iced tea a tire filled with air a bucket of salt water a balloon filled with helium

10 moles of carbon dioxide has a mass of 440 g. What is the relative formula mass of carbon dioxide?

Using the Brønsted theory, classify the following as either an acid or a base by placing the compound in the correct bin.

Which pair of nitrogen bases will form a bond in a DNA molecule? a. cytosine and adenine b. adenine and thymine c. guanine and thymine d. thymine and cytosine

Most meteors that fall into the earths atmosphere burn up before reaching the ground. Why is this?

Imagine a chemist is in the lab and trying to make some chemical reactions happen. In one reaction she reacts chemicals in an exothermic reaction and there is an increase in entropy.

Which of the following requires an oxidizing agent? Al yields Al3+ 2 O yields O2 Cl2 yields 2 Cl- Ag + yields Ag

Type of ion formed by group 2A elements