Question 1 of 25 While investigating a car crash, Mary took pictures of the skid marks to help
her discover what happened. What was Mary gathering?
A. Hypotheses
B. Measurements
C. Ideas
D. Evidence

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

Label a-f based on the table using c for concentrated and d for dilute