How could the appearance of a substance change with out it becoming a different substance

Do covalent bonds have conductivity

12.5M AgNO3 is made using 3.5L H2O. How many grams AgNO3 are needed to produce the solution?

A helium-filled balloon has a volume of 2.75 L at 20.°C. The volume of the balloon decreases to 2.46 L after it is placed outside on a cold day. What is the outside temperature in K? in °C?

Calculate the pH of a 0.0224M HCl solution.

What is the total number of grams of NaI (s) needed to make 1.0 liter of a 0.010 M solution? (1) 0.015 (3) 1.5 (2) 0.15 (4) 15

If a sample of copper with a density of 8.90 g/cm3 displaces 13.0 mL of water when placed in a beaker, what is its mass? a 1.46 g b. 0.685 g c. 116 g

Which statement accurately describes the origin and expansion of the universe

Conversion. 5 km to inches

How many kilojouls are required at 0c to melt an ice cube with a mass of 25g

Which substance is the oxidizing agent in this reaction? 2CuO+C→2Cu+CO2 Express your answer as a chemical formula.