Input interpretation
![strontium hydride | molar mass](../image_source/d33bd82bc3c38e8d89f948afa93edc01.png)
strontium hydride | molar mass
Result
![Find the molar mass, M, for strontium hydride: M = sum _iN_im_i Plan: • Write the chemical formula and gather atomic masses from the periodic table. • Determine values for N_i and m_i using these items. • Finally, compute the mass. Write the chemical formula: H_2Sr Use the chemical formula to count the number of atoms, N_i, for each element: | N_i H (hydrogen) | 2 Sr (strontium) | 1 Look up the atomic mass, m_i, in g·mol^(-1) for each element in the periodic table: | N_i | m_i/g·mol^(-1) H (hydrogen) | 2 | 1.008 Sr (strontium) | 1 | 87.62 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molar mass, M: Answer: | | | N_i | m_i/g·mol^(-1) | mass/g·mol^(-1) H (hydrogen) | 2 | 1.008 | 2 × 1.008 = 2.016 Sr (strontium) | 1 | 87.62 | 1 × 87.62 = 87.62 M = 2.016 g/mol + 87.62 g/mol = 89.64 g/mol](../image_source/e10c66d9d7596ab4a78434e12d6a09a9.png)
Find the molar mass, M, for strontium hydride: M = sum _iN_im_i Plan: • Write the chemical formula and gather atomic masses from the periodic table. • Determine values for N_i and m_i using these items. • Finally, compute the mass. Write the chemical formula: H_2Sr Use the chemical formula to count the number of atoms, N_i, for each element: | N_i H (hydrogen) | 2 Sr (strontium) | 1 Look up the atomic mass, m_i, in g·mol^(-1) for each element in the periodic table: | N_i | m_i/g·mol^(-1) H (hydrogen) | 2 | 1.008 Sr (strontium) | 1 | 87.62 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molar mass, M: Answer: | | | N_i | m_i/g·mol^(-1) | mass/g·mol^(-1) H (hydrogen) | 2 | 1.008 | 2 × 1.008 = 2.016 Sr (strontium) | 1 | 87.62 | 1 × 87.62 = 87.62 M = 2.016 g/mol + 87.62 g/mol = 89.64 g/mol
Unit conversion
![0.08964 kg/mol (kilograms per mole)](../image_source/99fa9b70029477a0f83516b972f9d667.png)
0.08964 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.12 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/cf3f57252c15e6f3de8906289bb2de24.png)
≈ ( 0.12 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.46 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/2eb676ccabaa7a9dd97b1b66a82f9e5b.png)
≈ 0.46 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.5 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/849b3f908f344a76d6b9c987c20040df.png)
≈ 1.5 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.5×10^-22 grams | 1.5×10^-25 kg (kilograms) | 90 u (unified atomic mass units) | 90 Da (daltons)](../image_source/0882d5a22d8f86dca84f9d9b0cc49984.png)
Mass of a molecule m from m = M/N_A: | 1.5×10^-22 grams | 1.5×10^-25 kg (kilograms) | 90 u (unified atomic mass units) | 90 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 90](../image_source/4a4f261da46a4911b63b7bbf51b88c3c.png)
Relative molecular mass M_r from M_r = M_u/M: | 90