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3 lip 2019 · The molar mass of a substance is the mass of one mole of the substance. This collection of ten chemistry test questions deals with calculating and using molar masses. The answers appear after the final question.
28 maj 2020 · A compound of carbon and hydrogen contains 92.3% C and has a molar mass of 78.1 g/mol. What is its molecular formula? Answer . C 6 H 6
Practice Questions for Molar Mass. This text contains content from OpenStax Chemsitry 2e. Chemistry 2e by OpenStax is licensed under Creative Commons Attribution License v4.0. Download for free here.
26 lut 2024 · Moles = Mass/Mr | AQA GCSE Chemistry Practice Questions. 1) What mass of hydrogen is produced when 192 g of magnesium is reacted with hydrochloric acid? Mg + 2 HCl → MgCl 2 + H 2 (3 marks) 2) What mass of oxygen is needed to react with 8.5 g of hydrogen sulphide (H 2 S)? 2 H 2 S + 3 O 2 → 2 SO 2 + 2 H 2 O (3 marks)
This online quiz is intended to give you extra practice in naming chemical compounds, including ionic compounds made from simple or polyatomic ions, binary molecular compounds, or common acids. Select your preferences below and click 'Start' to give it a try!
The molar mass of a substance is the mass of one mole of that substance. It is expressed in grams per mole (g/mol). The molar mass of an element is numerically equal to its atomic mass in unified atomic mass units (u or amu).
A sample of a chromium compound has a molar mass of 151.99 g/mol. Elemental analysis of the compound shows that it contains 68.43% chromium and 31.57% oxygen. What is the identity of the compound? 8.
