One nucleus contains 31 protons and 40 neutrons. Another nucleus contains 31 protons and 41 neutrons. What can you conclude about the identity of these nuclei?

What would you see when an iron rod is placed into a solution containing aqueous copper (ll) ions

Find the volume of 0.100 M hydrochloric acid necessary to react completely with 1.51 g Al (OH) 3.

Which statement most accurately compares the temperature of the core of the sun to its surface? A) the core is more than a thousand times hotter than the surface B) the surface is more than a thousand times hotter than the core C) the core is more

What is the molality of aqueous nitric acid HNO3 (63 g/mol) that has a density of 1.42 g/mL and is 16.7 M? Report your answer to three significant figures. Do not include units.

Which is not a compound? sugar water silicon dioxide gold

Calculate the mass percent composition of sulfur in Al2 (SO4) 3. Calculate the mass percent composition of sulfur in Al2 (SO4) 3. 28.12 % 42.73 % 35.97 % 9.372 % 21.38 %

What is a striking a match an example of

In any ordinary chemical reaction, matter is neither created nor destroyed; it is simply changed from one chemical substance to another. This principle is called the Law of:

Which of the following shows no reaction with acid? A. copper B. copper carbonate C. magnesium carbonate D. magnesium

Describe what happens to salt when it dissolves in water.