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Did water condense on a can of juice that was removed from the refrigerator? Is this a physical change or chemical change? 2. Did you eat toast for breakfast? Is this a physical change or a chemical change? 3. Observe a dull penny and shiny penny.

O-18, an isotope of oxygen, has a stable nucleus. O-19, another isotope of oxygen, does not have a stable nucleus. Based on this information, which statement is correct? O-19 is radioactive; O-18 is not radioactive.

Which of the following is the correct scientific notation for 0.0000782 g? 7.82*105 g 7.82*106 g 7.82*10-6 g 7.82*10-5 g

Lead (II) nitrate and ammonium iodide react to form lead (II) iodide and ammonium nitrate according to the reaction Pb (NO3) 2 (aq) + 2NH4I (aq) ⟶PbI2 (s) + 2NH4NO3 (aq) What volume of a 0.590 M NH4I solution is required to react with 225 mL of a 0.

What is a Agricultural waste used as fuel is an example of a?

3. Which means of particle transport requires input of energy from the cell? diffusion osmosis facilitated diffusion active transport

Which best describes a spontaneous process as it relates to the second law of thermodynamics? It destroys heat. It requires work. It creates energy. It occurs naturally.

What mass (in mg) does 2.63moles of nickel have?

What does the energy hill represent on an energy diagram? A. The potential energy gained by the products when a reaction happens B. The final amount of potential energy of the products of the reaction C.

Compared to the ideal angle, you would expect the actual angle between the bromine-oxygen bonds to be