Which change results in the formation of different substances?

(1) burning of propane

(2) melting of NaCl (s)

(3) deposition of CO2 (g)

(4) solidification of water

Conductive definition science term

Tamara is doing a scientific investigation to answer the question, "Do corn seeds germinate faster at warmer temperatures than they do at cooler temperatures?" In Tamara's experiment, which variables need to be held constant?

Which of the following reactions would be classified as oxidation-reduction? Check all that apply. 2Na (s) + Cl2 (g) →2NaCl (s) Na (s) + CuCl (aq) →NaCl (aq) + Cu (s) NaCN (aq) + CuCl (aq) →NaCl (aq) + CuCN (s)

Moles of Zn (NO3) 2 in 131.50g of this substance.

A Block has a volume of 0.09 m³ and a density of 4000 kg/m³. what's the force of gravity acting on the block in water

If the titrant has a molarity of 0.1000 m and there are 45.00 ml of analyte present, what is the molarity of the analyte?

How is the hardness range for a mineral determined?

How do I find density

Which statement describes a concept included in the wave-mechanical model of the atom? 1. Positrons are located in shells outside the nucleus. 2. Neutrons are located in shells outside the nucleus. 3.

The process by which rocks are broken down into smaller fragments by the atmosphere and other factors in the environment is called?