What happens to a glass of water at a temperature of 20°c when it is placed into a freezer set at –10°c? a; it cools to –10°c, where it stays until freezing is complete. b; it freezes, then the temperature drops to 0°c and then to –10°c. c; it cools to 0°c, where it stays until freezing is complete. d; it freezes, then the temperature drops to 0°c and stays there.

The answer is is most likely A but, if not, then I don't know

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

d.) circle motion requires a force to give it a centripetal acceleration.