According to the law of conservation of matter, how must a chemical equation be
written?
The same coefficient must be applied to every molecule i the equation.
The subscript of every element must be the same on tal side of the equation.
An equal number of compounds must appear on each side of the equation.
An equal number of atoms must be on both sides of the equation.

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )