1.738 g/cm<span>3 is the density of magnesium just multiply it you will get 69.52g.That's my final answer.</span>
The number of grams of Mgo that are produced is calculated as follows
calculate the moles of Mg used
that is moles =mass/molar mass
= 3.45 g/ 24.305g/mol = 0.142 moles
write the equation for reaction
that is 2 Mg + O2 = 2 MgO
by use of mole ratio between Mg to Mgo which is 2:2 this implies that the moles of Mgo is also 0.142 moles
mass of Mgo= moles x molar mass of MgO
molar mass of Mgo = 24.305 + ( 3x15.999) = 72.302 g/mol
mass= 0.142 mol x 72.302 g/mol= 10.27 grams
Answer: option d
Explanation:
Because every thing in our home is made from chemicals
The answer is heat, water has a high specific heat and is able to carry a lot of energy.
Avagadros number states that 1 mol of any substance is made of 6.022 x 10²³ units.
these units could be atoms, molecules or formula units.
therefore 1 mol of Calcium iodide is made of 6.022 x 10²³ formula units
so if 6.022 x 10²³ formula units make up 1 mol
then 1.20 x 10²⁵ formula units - make 
= 19.9 mol
there are 19.9 mol of CaI₂ present
