What is the volume of 0.2 moles of helium at STP

4.48 L

Explanation:

1 mol of gas at STP = 22.4 L

0.2 mol * 22.4 L/1 mol = 4.48 L

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.