Which equation shows a physical change?

Pb (NO3) 2 (aq) + 2KI (aq) _ 2KNO3 (aq) + PbI2 (s)

HCl (aq) + NaOH (aq) _ NaCl (aq) + H2O (l)

2H2O (l) _ 2H2 (g) + O2 (g)

H2O (g) _ H2O (s)

A student forgot to read the label on the jar carefully and put potassium chloride in the crucible instead of potassium chlorate. how would the results turn out

When a bottle of soft drink is shaken violently, CO2 gas escapes from solution and exerts increased pressure on the interior of the bottle. If the bottle were to be opened in this condition, the beverage would spurt out of the bottle.

What is the complete ground state electron configuration for the selenium atom?

An atom can be described as a-the smallest particle that has all the characteristics of a compound b-the smallest particle that has all the characteristics of an element c-a charged particle that is similar to a molecule d-a charged particle that is

John dalton believed that water was formed from the simplest combination of hydrogen and oxygen atoms one of each. ObservTions today show that 8g of oxygen react with 1g of oxygen to form water

Solid iron has a density of 7.9 g/cm3. Liquid mercury has a density of 13.6 g/cm3. will iron float or sink in mercury explain

Convert 6.42 moles of H2O to molecules

An aspirin tablet contains 81.0 mg of aspirin, which has the molecular formula, c9h8o4.

What size container do you need to hold 0.0459 mol of N2 gas at stp

What happens when two or more atoms react?