PHI-2635 Study Guide - Midterm Guide: Significant Figures, Decimal Mark, Qingpu District, Shanghai
Document Summary
Class hours: mwf 12:20 1:10 pm, 255 flh. Office hours: mw 9:30-10:30 am or by appointment. During a chemical or physical change the mass of a closed system remains constant. Energy cannot be created or destroyed in a chemical reaction or in a physical change. It can only be converted form on for to another. The law of conservation of matter and energy. Molecules do not change from states of matter, only bonds. Matter all samples of which have identical composition and properties. A substance cannot be broken down any further. 2. 97 (cid:1876) 10(cid:2871)(cid:1855)(cid:1865) (cid:1859)(cid:1861)(cid:1874)(cid:1857)(cid:1866) (cid:1873)(cid:1866)(cid:1861)(cid:1872) (cid:1876) (cid:1856)(cid:1857)(cid:1871)(cid:1861)(cid:1870)(cid:1857)(cid:1856) (cid:1873)(cid:1866)(cid:1861)(cid:1872) (cid:1755)(cid:1755)(cid:1755)(cid:1755)(cid:1755)(cid:1755)(cid:1755)(cid:1755)(cid:1755)(cid:1755)(cid:1755) (cid:1859)(cid:1861)(cid:1874)(cid:1857)(cid:1866) (cid:1873)(cid:1866)(cid:1861)(cid:1872) (cid:1865)(cid:2871) =(100)(cid:2871)(cid:1855)(cid:1865)(cid:2871) Density - si unit derived unit for density kg/m^3. A piece of a gold ingot with a mass of 301 g has a volume of 15. 6cm . The number of atoms in 12g of carbon: The mass of a single carbon atom in grams: Write each quantity with the same exponents n.
