CHEM 161 Lecture 1 Answers | 2023 Approved

What are the SI Base Units? length (meter); Mass (kilogram); time (seconds); temperature (kelvin); amount of a substance (mole); electric current (ampere); luminous intensity (candela) What’s the SI Base Unit for length? meter What’s the SI Base Unit for mass? kilogram (kg) What’s the SI Base Unit for time? second (s) What’s the SI Base Unit for amount? mole (m) What’s the SI Base Unit for temperature? Kelvin What’s the SI Base Unit for current? ampere What’s the SI Base Unit for luminous intensity? candela What is Planck’s constant? 6.626 x 10^-34 Js What are the SI prefixes? What do they mean? Tera (T) = 10^12 Giga (G) = 10^9 Mega (M) = 10^6 Kilo (k) = 10^3 Base Unit = 10^0 = 1 Milli (m) = 10^-3 Micro (u) = 10^-6 Nano (n) = 10^-9 Pico (p) = 10^-12 When are standard prefixes used for? Standard prefixes are used for every three powers of 10 What is centi? 10^-2 c Tera T, 10^12, Trillion Giga G, 10^9, billion Mega M 10^6, million Kilo k, 10^3, thousand Milli m, 10^-3, 0.001 Micro u, 10^-6, 0. Nano n, 10^-9, billionth Pico p, 10^-12, trillionth Convert between Milli and Pico given 0.35 mm. 0.35 mm (1m/10-3 mm) (10^-12 p/1 m)