What is an indicator that a chemical change has occurred?

An acid has an excess of ___ions

What are 4 examples of sediment that may become sedimentary rock

A gas has a volume of 420 L at a temperature of - 42.0 degrees celsius. What volume will the gas occupy at 18.0 degrees celsius? Show your work

How many atoms of chlorine in 13 g of mgcl2

1. Islands in the middle of the oceans (for example, Great Britain, Hawaii, Bermuda) tend to have more stable climates with smaller temperature fluctuations than regions of the same mass surrounded by land (for example, continents).

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?

Be sure to answer all parts. Enter the formula for potassium dihydrogen phosphate and determine its molecular (formula) mass.