The phase diagram for carbon is shown. Carbon Phase Diagram 106. Which phases are present at the lower triple point? solid I (diamond) 105 liquid 104 graphite P 103 (atm) 102- solid II (graphite) diamond gas gas 10- liquid 1- 1000 2000 3000 4000 5000 6000 T (K) Which phase is stable at 1 atm and 273 K? graphite gas liquid O diamond trinle point, what action would 口□

9 grams of NaCl are dissolved in 99 grams of water in a 2.0 L container. What is the mass percent of NaCl? Report your answer to 1 decimal place.

5. Calculate the volume of a 30.0 g liquid with a specific gravity of 0.90.   a 27.0 mL   b 33.3 mL   c 27 mL   d 33 mL

formulate a hypothesis. the hypothesis can be about anything.

A student determines the concentration of an unknown sample using two different methods. Each method has three different trials; the average, standard deviation and percent error produced by each method is listed below. Method 1 Average: 10.56 M NaOH Standard deviation: 1.35 M NaOH Percent error: 1.25% Method 2 Average: 10.92 M NaOH Standard deviation: 1.02 M NaOH Percent error: 3.45% Which method was more precise? How can you tell?

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25) If time could be expressed in ppm, how many seconds per year would be 2.5 ppm?

Using any chemical concept in a lab using TLC, make a connection to an event in the news. Your writing should find at least one way, if not more, in which the chemical concept you have chosen is demonstrated.

Cefuroxime is to be administered 20mg per Kg IV Q4H. How many mg per dose should a child weighing 36 pounds receive?

Pre-lab 1. In your own words, what is accuracy and precision? Why are they important in the clinical lab?