Answer:
214.77 g/mol
Step-by-step explanation:
Tin(II) sulfate 
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Tin(II) sulfate 
Tin(II) sulfate crystallizes in an heavily distorted barium sulfrate structure. 
Unit cell of tin(II) sulfate. 
Names 
Other names 
Stannous sulfate 
Identifiers 
CAS Number 
7488-55-3 ☑ 
3D model (JSmol) 
Interactive image 
ChemSpider 
21106484 ☑ 
ECHA InfoCard 100.028.457 Edit this at Wikidata 
EC Number 
231-302-2 
PubChem CID 
62643 
UNII 
0MFE10J96E ☑ 
CompTox Dashboard (EPA) 
DTXSID20884389 Edit this at Wikidata 
InChI[show] 
SMILES[show] 
Properties 
Chemical formula SnSO4 
Molar mass 214.773 g/mol 
Appearance white-yellowish crystalline solid 
deliquescent 
Density 5.15 g/cm3 
Melting point 378 °C (712 °F; 651 K) 
Boiling point decomposes to SnO2 and SO2 
Solubility in water 33 g/100 mL (25 °C) 
Structure[1] 
Crystal structure Primitive orthorhombic 
Space group Pnma, No. 62 
Lattice constant 
a = 8.80 Å, b = 5.32 Å, c = 7.12 Å[2] 
Hazards 
NFPA 704 (fire diamond) 
NFPA 704 four-colored diamond 
010 
Flash point Non-flammable 
Lethal dose or concentration (LD, LC): 
LD50 (median dose) 2207 mg/kg (oral, rat) 
2152 mg/kg (oral, mouse)[3] 
Related compounds 
Other anions Tin(II) chloride, tin(II) bromide, tin(II) iodide 
Other cations Lead(II) sulfate 
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). 
 
Tin(II) sulfate (SnSO4) is a chemical compound. It is a white solid that can absorb enough moisture from the air to become fully dissolved, forming an aqueous solution; this property is known as deliquescence. It can be prepared by a displacement reaction between metallic tin and copper(II) sulfate:[4] 
 
Sn (s) + CuSO4 (aq) → Cu (s) + SnSO4 (aq) 
Tin(II) sulfate is a convenient source of tin(II) ions uncontaminated by tin(IV) species.