2023 2nd RP Exam

Change from standard form to scientific notation: 12,000,000

• 12.0  x  10⁷

• 0.12  x  10⁷

• 1.2  x  10⁶

• 1.2  x  10⁷

Change from standard form to scientific notation:  0.000398

• 39.8  x  10^-5

• 3.98  x  10^-5

• 3.98  x  10^-4

• 39.8  x  10^-6

The compound N₂O₃ is named...

• nitrogen oxide

• nitrogen(II) oxide

• nitrogen(III) oxide

• dinitrogen trioxide

The compound P₄S₅ is named...

• phosphorus sulfide

• phosphorus(V) sulfide

• phosphorus(IV) sulfide

• tetraphosphorus pentasulfide

The chemical formula for dichlorine heptoxide is...

• Cl₂O₇

• ClO

• Cl₂O₆

• 2Cl₇O

The chemical formula for calcium carbide is...

• Ca₄C₂

• CaC₂

• Ca₂C₄

• Ca₂C

How many atoms of iodine are in a mole of iodine?

• 53

• 6.02 x 10²³

• 63.55g

• 126.9

The number 6.02 x 10²³ is called...

• Obama's number

• Bohr's number

• Avogadro's number

• Avocado's Number

How many moles are in 8.30 X 10²³ molecules of H₂O?

• 1.38 X 10²³ moles H₂O

• 1.38 moles H₂O

• 2 moles H₂O

• 1 mole H₂O

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴