State whether the following are elements, compounds or mixtures Salt
Sugar
Hydrogen
Oxygen
Tomato sauce
cake batter
Nitrogen
Aluminium
Gulab Jamun
Water
Salty water

hydrogen, nitrogen, oxygen, aluminium are elements

salt, sugar, tomato sauce, cake batter, salty water are mixtures

Explanation:

all the elements in the group halogens in the periodic table are compounds.

they both have a y in them

"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"