An insulin solution is given to a patient suffering from hyperglycemia at the rate of 20.0 ml/hr. The concentration of the insulin stock solution is 200. units/500 mL. How many units of insulin per hour is the patient receiving?

• 8.00 units/hr

• 10.0 units/hr

• 200 units/hr

• 500 units/hr

Which property of water is unchanged when sodium chloride is added to it?

• boiling point

• color

• melting point

• osmotic prssure

How many moles of C₁₃H₁₈O₂ are in a 250 mg dose of Advil? Assume the molar mass is 206 g/mol.

• 1.21 x 10^-3

• 1.21 x 10^-2

• 2.60

• 2.50 x 10-2

The pictures below represent different substances that have been dissociated in water to varying degrees. Strong acids (H⁺ or H₃O⁺) and bases (OH^-) separate completely in water while weak acids and bases do not. Which picture represents a strong acid (HA) dissolved in water (assumed)?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-3

In the states of matter, we can differentiate them based on how they behave in a container. What is the physical state that has a variable shape and cannot be readily compressed?

• gas

• plasma

• liquid

• solid

Which is an ionic compound?

• NO₂

• CO

• SiO₂

• Ca(OH)₂

Tags

NGSS.HS-PS1-3

Methane gas reacts with oxygen present in the air to form carbon dioxide and water. This reaction is an example of:

CH₄ + 2 O₂ --> CO₂ + 2 H₂O

• combination (synthesis)

• combustion

• decomposition

• endothermic

What is the charge of a single cation in Fe₂O₃?

• 3-

• 2+

• 3+

• 6+

Considering the number of valence electrons, how many bonds will a chlorine atom form to satisfy the octet rule?

• one

• two

• three

• four

Which is the electron configuration for the element phosphorus?

• 1s²2s²2p⁶2d⁵

• 1s²2s²2p⁶3s²3p³

• 1s²2s²3p⁶4s²5p³

• 1s²2s²2p⁶3s²3p⁶4s¹

Tags

NGSS.HS-PS1-1