PLEASE HELP ME 14. The diagram below represents a graduated cylinder containing water before and after a rock suspended on a string is lowered into it.
What is the approximate volume of the rock suspended in the graduated cylinder?
1. 50 ml
2. 100 ml
3. 250 ml
4. 300 ml

Classify each statement about effective nuclear charge, zeff, as true or false.

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.