2015 Coal First Aid Statements No. 5 Taken from the 2015 National Coal First Aid Contest Rules Progress Indicator: Question 3 of 20 3.   Table 1 1 - Component of Afterdamp 2 - Slightly soluble in water 3 - Toxic 4 - Asphyxiant 5 - Lighter than air 6 - Heavier than air 7 - Component of rock strata gas 8 - Not soluble in water Using Table 1, match the attributes with the gas.  The correct answer must contain all of the attributes shown in Table 1 for this gas. Carbon Dioxide (CO2) Choices: 4 only 1, 4, 5, 8 1, 3, 6, 7 2, 4 None of the above