Strontium (Sr). Elements in the same group of the periodic table have similar characteristics.
For water you could add oil..ex: cooking oil separates form water because water is heavier than oil.
For Magnesium Sulfate you could add Sodium Carbonate..ex: Sodium Carb reacts to Mg Sulfate adding a darker hue to the liquid and adding a lot of bubbles.
For Sodium Carbonate you could add Sulfuric Acid..ex: Sulfuric Acid would add a reaction to the Sodium Carb that would resembling water boiling
H0P3 It H3LPS :)
The amount of grams of phosphorus that are recommended is 0.700 g
Why?
This is an unit conversion problem. To convert between units we use conversion factors. In this case the conversion factor we want is from mg to g, and this is relatively simple: 1000 mg = 1 g. Now, we arrange the quantities in the following way:

Conversion factors are really useful for converting units! Just remember to put the unit you don't want at the bottom, and the one you want at the top.
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I think this one is the “a wall of water that is pushed ashore”
Answer:
endothermic means energy is taken in and temperature increases.