Verify your calculation. In your set-up, do your units cancel? Did you report your data to the correct number of significant figures? 0.015 Mass of magnesium (g) Moles of magnesium (mol) 0.00062 23.0 Temperature of water (°C) 296.15 Temperature of water (K) 21.1 Vapor pressure of water (mmHg) Barometric pressure (mmHg) 781.0 Observations the metal causes the water to bubble Volume of hydrogen gas collected (mL) 15.0 Volume of hydrogen gas collected (L) 0.015 Pressure of hydrogen gas (mmHg) 742.5 Pressure of hydrogen gas (atm) 58.9 Moles of hydrogen gas produced (mol) 0.413 Ideal gas constant (L-atm-mol-K) 38.5

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.