Question

Luis is helping his parents paint a border around the walls of a room. He uses a stencil to repeat the same design on each wall to form one long grapevine with a bunch of grapes every foot along its length. What type of chemical reaction does this best model?

replacement
decomposition
polymerization
synthesis



Rosa was looking for patterns to help predict the products of chemical reactions. She recorded three similar decomposition reactions in the table.

A 2-column table with 3 rows. The first column labeled reactants has entries 2 N a C l O subscript 3, 2 K C l O subscript 3, 2 L i C l O subscript 3. The second column labeled products has entries 2 N a C l + 3 O subscript 2, 3 O subscript 2 + 2 K C l, empty.

What products should she record in the last row of the table?

2LiCl + 3O2
3LiCl + 2O2
2LiO + 3Cl2
3LiO+ 2Cl2




Which is produced in a synthesis reaction?

a single element
a single compound
a single ion
a single atom

Answer 1

1) Polymerization — the repeating design units join to make one long "chain."

2) 2 LiCl + 3 O2 — lithium chlorate decomposes the same way: 2LiClO3 → 2LiCl + 3O2.

3) A single compound — synthesis (combination) reactions form one compound from simpler reactants.