Which is true for the following reaction: 3Sn2+(aq) + Cr2O72-(aq) + 14 H+(aq) LaTeX: \longrightarrow⟶ 3 Sn4+(aq) + 2 Cr3+(aq) + 7 H2O(l)

Yes it would be a physical change.

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.

The main types of electromagnetic radiation. radio  waves have  the lowest frequencies  and  longest  wavelengths, while gamma  waves have highest frequencies  and shortest wavelengths. the wavelengths vary across the electromagnetic spectrum from about 10–15 m to more than 104 m.hope it !