A baby is continuously propped up by a pillow and a towel is rolled under the bottle to keep the bottle propped up. This baby is at risk for:

List the 4 stages of Growth Pattern 

(WCSP24) You used a titration in the water hardness experiment.  Please respond to the following in a few words: a.  Why is a titration useful? b.  Describe what is happening at the atomic level throughout the titration. c.  How do we know that the titration is complete?

Copper was mixed with nitric acid (HNO3). Fizzing and bubbling occurred along with a color change from colorless to blue. The gaseous product was collected in a test tube and exposed to a glowing splint.  A loud pop was heard.  (WCSP24) Identify the gas produced and indicate what observation would correspond to a different gas by making the following matches.

Read the volume measured in the graduated cylinder below.  Report the value with the appropriate number of significant figures and an uncertainty. (WCSP24)

18. ..continued b. (2 points) Determine the % error between the student’s observed wavelength and Bohr’s.   Enter the value in the box below (numerical characters only).

11.  A student is determining the Ideal Gas Law constant with the reaction of calcium carbonate and vinegar as shown below. Rather than using different moles of reactants and measuring volume of gas produced, the student decided to use different temperatures and measure the volume. (WCSP24.) 2 CH3COOH (aq) +  CaCO3 (s)

(WCSP24) Read the volume measured in the graduated cylinder below.  Report the value with the appropriate number of significant figures and an uncertainty.

19.  (WCSP, 5 points) Hydrogen bonding is responsible for many of the interesting and unusual properties of water. Draw a picture showing hydrogen bonding in liquid water.  Use three water molecules in your drawing and dashed lines to depict the hydrogen bonding interactions. Enter the number of hydrogen bond donor-acceptor interactions in the sketch.  

(WCSP24) Explain the “like dissolves like” principle. Use at least two specific examples in your explanation.