The elephant toothpaste reaction and the reaction of sugar and sulfuric acid are examples of exothermic reactions because the temperature of the reactants was less than the temperature of the • reactants
• sugar
• products
Theoretically, the Law of Conservation of the Mass states that the mass of the reactants in
• only exothermic
• only endothermic
• all
chemical reactions should be
• greater than
• less than
• equal to
the mass of the
• products
• sulfuric acid
• reactants

yes they ca   is ur ansswerrr

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

hi my dude or dudette