In this experiment, we used 10 g of sand, 10 g of iron filings and 200 mL of NaNO 3 .
(we; used; 10 g of sand, 10 g of iron filings and 200 mL of NaNO 3; L:In this experiment)
we
used
10 g of sand, 10 g of iron filings and 200 mL of NaNO 3 L:In this experiment