Which type of bonding does not involve the sharing of electrons but causes a compound to be polar? Covalent bonding  
Ionic bonding  
Polar covalent bonding  
Metallic bonding

How many atoms are there in 5.70 mol of mg

What is the molar mass of ca(cio4)2

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.