You have 16.6 g of water at 40.2 C. How many Joules are needed to warm the water to 44.8 C?

Q = 319.49 J

Explanation:

Given that,

Mass, m = 16.6 g

Initial temperature,

We need to find the heat needed to warm the water to 44.8 °C. The formula that is used to find the heat required is given by :

So, 319.49 J of heat is needed to warm water.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

a is the answer to this question

explanation: