Molar Mass of Sr(OH)2 (Strontium Hydroxide)

Molar Mass Calculator

What is the molar mass of Sr(OH)₂?

Answer

M(Sr(OH)₂) ≈

121.63 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — Sr: 87.62.

Sr(OH)₂ = Sr + 2 × (O + H) → Sr 1, O 2, H 2

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Srstrontium	1	87.62	87.62 w ≈ 72.04%	≈ 72.04%
Ooxygen	2	15.999	31.998 w ≈ 26.31%	≈ 26.31%
Hhydrogen	2	1.0080	2.0160 w ≈ 1.66%	≈ 1.66%
Σ = 121.634 ≈ 121.63 g/mol w = 100%				100%

Each fraction is rounded on its own, so the printed ones add up to 100.01%; unrounded, they make exactly 100%.

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

Sr 72.04%

O 26.31%H 1.66%

Related Calculations

See Also

Liters to Kilograms - How many kilograms are in a liter of water, honey, gasoline, sand and other substances — by density
Grams to Kg - Convert Grams to Kilograms
Percentage Calculator: Fraction to Percent - What percentage one number is of another? Convert fraction into a percentage
Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89

Recalculate with different values ↑

Molar masses of substances nearby

Formula	M, g/mol
C₈H₈O (acetophenone)	120.151
MgSO₄ (magnesium sulfate)	120.36
C₄H₁₁NO₃ (tromethamine)	121.136
Sr(OH)₂ (strontium hydroxide)	121.63
Sb (antimony)	121.76
Na₂SiO₃ (sodium metasilicate)	122.062
C₆H₅COOH (benzoic acid)	122.123

FAQ

What is the molar mass of Sr(OH)2?

M(Sr(OH)₂) ≈ 121.63 g/mol

How to calculate the molar mass of Sr(OH)₂?

Add up the atomic weights of all the atoms in the formula: 87.62 + 2 × 15.999 + 2 × 1.0080 = 121.634 ≈ 121.63 g/mol.

How many grams are in 2 moles of Sr(OH)₂?

m = n × M = 2 mol × 121.63 g/mol = 243.26 g.

See Also