Describe two observations you might make when a chemical change takes place

If an atom has 8 protons. How many electrons does it have? What is the atoms charge?

What is the relative mass of an electron?

Which statement describes potential energy? energy of motion stored energy energy due to heat used energy

Which atom (s) is/are electrophilic in methanol (ch3oh) ?

Which of the following is a cause of soil compaction? a. an increase in the amount of organic matter b. the use of equipment on dry soil c. the use of heavy equipment d. all of the above

Calculate the energy released in the following fusion reaction. The masses of the isotopes are: 14N (14.00307 amu), 32S (31.97207 amu), 12C (12.00000 amu), and 6Li (6.01512 amu).

How many grams of carbon dioxide are produced from 0.98 mol of Fe3O4?

There is inverse relation between pressure and diffusion in liquid phase? •True •False

What do you need in order to do a stoichiometric calculation? (Choose multiple) Balanced Chemical Equation Molar masses of compounds involved The type of reaction taking place Oxidation Numbers

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is: