Pre-Lab Question 6.6 Mark as: None correct answers are hidden A 8.85 g sample of hydrate of sodium carbonate, Na_{2}CO_{3}XH_{2}O was heated carefully until no more mass was lost from the sample. After heating, the final weight of the material was 7.55 g. How many moles of Na_{2}CO_{3} remained after heating? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 0.0712 moles b 0.0835 moles c 0.123 moles d 0.142 moles