Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technician B says that a leaking head gasket can be found using an exhaust gas analyzer. Who is correct?

Which would show an example of how physical changes are reversible? A cutting a gold bar in two pieces and then putting the pieces next to each other B burning a match and then relighting it C melting tin and then cooling it into a mold D combining

How many milliliters of. 5 M HCl will neutralize 35 mL of 1 M NaOH? A) 70 mL B) 50 mL C) 35 mL D) 65 mL

How many grams are in 102 moles of magnesium?

What is true when a reaction has reached equilibrium? A the reaction rate is equal in both directions B The reaction has stopped C the reaction is faster in the forward direction D the reaction is faster in the reverse direction

Objects viewed through a microscope are usually measured in which units?

NaCl in roman numerals

A compound has an empirical formula of C2H6. What additional piece of evidence is needed to determine the molecular formula? a. percent composition of carbon b. mass of the sample c. relative numbers of atoms of each element d.

Educated guess about the meaning of the word atom

Which of the following symbols could represent an atom of an element

How many sugar molecules are in a 3 M sugar solution (V=1L) ?