Lesson 9 and 10:

Today we went over lesson 9 and 10! In lesson 9, we covered scientific notation which is a number in standard notation can be converted to scientific notation by writing it as a decimal with one digit to the left of the decimal point times a power of ten. Ex. 1.56*10^4= 15600. Then we went over molar mass, which is the mass of one mol of a substance. The atomic mass given on the table is equivalent to the mass of 1 mol of atoms of the element in grams, which is molar mass. Molar mass allows you to convert between moles of atoms and grams of atoms.

In lesson 10, we continued with moles. A mole of any gas, if it is standard temperature pressure, it always has a volume of 22.4L(important!). Also, chemists use moles of a substance rather than masses because moles are a good way of counting atoms, molecules, or units. The molar mass of a compound is the sum of the molar masses of the atoms in the compound.

Homework:

 

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