Salts is the correct awnser
First off, With a hypothesis
Answer:
The oxygen produced is collected in the gas jar by downward displacement of water. When we insert the glowing matchstick in the jar containing the oxygen gas ,it burns with a bright light which proves that gas is oxygen because oxygen is supporter of combustion.
I believe this nuclide is potassium with the symbol K. Atomic number for an element remains constant no matter how the mass changes. From the periodic table, potassium has an atomic number of 19.
Answer:
Density = 
Explanation:
Density equals mass divided by volume.
Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).
