Answer:
The metal is most likely Sodium.
Explanation:
Iron is not soft enough to be cut with a knife and will not react violently with water. When Iron reacts with water it just slowly rusts.
Copper is somewhat malleable, however, does not really react with water and only forms an oxide layer in the air.
Sodium is soft enough to be cut with a knife (I know this because I have worked with it and seen people work with it). It is also an alkali metal which are known to explode when in water.
Gold is malleable but does not really react with anything and is considered inert.
Answer:
C) The dissolving reaction of A was exothermic, and the dissolving reaction of B was endothermic.
Explanation:
hope this helps :)
First, you have to find what percent of 25 is 9. The answer for that would be 36%. Then, you must subtract 36% (the blue marbles) from 100% (all of the marbles). That leaves you with 64% as your final answer.
The name or type of covalent bond in which electrons are shared unequally is a polar covalent bond.
