Katie's teacher has asked her to identify an unknown substance. She thinks about the properties of matter that will
help her identify the substance. She knows it is a colorless
liquid. She thinks it may be water but knows there are many
colorless liquids that are not water.
Which of the following statements would inform Katie that the
liquid is NOT water?
a The liquid freezes at 32°C.
b The liquid is clear.
C The liquid boils at 100°C.
d The volume of the sample is 100 ml.

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 !

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

answerleaving cheese out to get moldy;