Nevaeh Ramos TBA Periodic Table Atomic Structure
CALCULATOR
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QUESTION GUIDE
EXIT TEST
17
Which of the following properties are exhibited by the elements
in Column 1 on the periodic table?
o
Soft, have luster, and are very reactive with water
Gas, no luster, and non-reactive with water
Solid, brittle, and non-reactive with water
о
Hard, malleable, and ductile
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REVIEW & SUBMIT
3
3:26

the atomic mass is the bottom number on the element.

-steel jelly

"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"

the answer is 1 i believe