How many moles of SnF₂ will be produced along with 48 grams of H₂? *

Sn + 2HF (arrow) SnF2 + H2

12 moles
24 moles
48 moles
96 moles

24 moles of are produced.

Explanation:

To calculate the moles :

According to stoichiometry :

1 mole of is accompanied with = 1 mole of

Thus 24 moles of  is accompanied with =  of

Thus 24 moles of are produced.

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.