Which chemical equation represents a redox reaction? a. mg(clo3)2 + 2hcl → mgcl2 + 2hclo3 b. co + h2o → h2 + co2 c. 2nh4no3 + cucl2 → 2nh4cl + cu(no3)2 d. na2so3 + febr2 → 2nabr + feso3

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.

"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"

they are both synthetic elements

explanation:

d

2b2t

explanation:

2b2t