3rd 9 Wks Exam: Chemistry 2019-2020

How many significant figures does 705000 have?

• 2

• 3

• 5

• 6

Write 4.8 x 10⁰ in standard form.

• 0.48

• 480

• 4.8

• 48

How would you write 0.0005 in scientific notation?

• 5 x 104

• 5 x 10^-4

• 5 x 10^-3

• 0.5 x 10^-4

What is the molar mass of NaOH?

• 40 g/mol
• 38.989 g/mol
• 23.998 g/mol
• 57.004 g/mol

What type of reaction is this:

C₄H₁₂ + O₂ --> CO₂ + H₂O

• Synthesis

• Combustion

• Single Replacement

• Double Replacement

What is the volume of 2 moles of neon gas?

• 22.4 L

• 44.8 L

• 67.2 L

• 89.6 L

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1
• 1,1,1,2
• 1,2,1,1
• 2,1,1,1

Tags

NGSS.HS-PS1-7

What is the percent composition of Nitrogen in NO₂? (rounded)

• 30%
• 40%
• 50%
• 60%

Balance the following equation: _SnO₂ + _H₂ --> _Sn + _H₂O

• 1, 1, 2, 1

• 1, 2, 1, 2

• 1, 2, 1, 1

• 1, 2, 2, 1

Number of H in 3(NH₄)₂CrO₄

• 4

• 2

• 8

• 24