4 given the equation: MgCO3(s) + H2SO4(ag) ==> MgSO4(aq) + H2O(1) +CO2(g) What mass of magnesium carbonate

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

Putting salt in vinegar water

We can't until we know what we are working with or on