RolandoHerreraCHEM1311.08PRE

Give an example(s) of a physical property

• color and melting

• combustability

• rusting

• none of the above

Balance the following equation

C+O₂ ------>CO     

• C+O₂ ------>CO     

• C+O₂ ------>2CO     

• C2+O₂ ------>CO     

• 2C+O₂ ------>2CO     

What is the empirical formula for the following equation

H₂C₂O₄.

• that is the empirical formula

• H₂C₂O₂.

• HCO₂.

• H₄C₄O₈.

How many significant figures in 523

• 3

• 2

• 1

• 4

What is the mass number of an iron atom that has 28 neutrons?

• 48

• 50

• 52

• 54

Convert 200 degrees celcius to kelvin

• 300

• 473.15

• 200

• 515.75

What is the element with the symbol Cl

• chlorine

• Gold

• Magnesium

• Carbon

Elements in the same group tend to have the same physical and chemical properties

• True

• Maybe

• false

Pizza is a heterogenous mixture

• True

• False

Which of the following is a molecular compound

• CH4

• NaBr

• BaCl2

• KCl