Step 7: Put the Metal in the Water and Measure Temperature Changes (Iron)
Observe the increase in temperature every
60 seconds for 300 seconds.
Initial temperature of metal =
°C
Initial temperature of water =
Poc
Final temperature of both =
PC
27
IH
DONE
26
25
24
23
250 ml
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01:00
Intro

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.