8. Chemical analysis of a gaseous compound showed that it contained 33.0% silicon and 67.0% of fluorine by mass. The mass of 0.316 L of the compound was 2.38 g at 1 atm and 25°C. i. Calculate the empirical formula of the compound. ii. Calculate the molecular formula of the compound.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

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.