Lab2_MetricMeasurement CHEM 120 study guide (NEW EXAM COPY 2023 )
CHEM120: Week 1 Lab Name: Michelle Ramsaroop You are giving your child a medicine that has a dosage of 2 tsp a dose. The instructions indicate that you are to give the child 3 doses day. How many days will a 100 ml bottle of medication last? Show all work below (1 point) 1tsp = 4.92892 2tsp = 9.85782 3 doses - 9.85782 X 3= 29.57346 100/ 29.58 = 3.347 100ml will last = 3.35 days 1. A chemical process dissolves 500 milligrams of iron oxide every 20 mins. How long would it take this reaction to dissolve 2 lbs of iron oxide? Show all work below (1 point) 1lb= 453.59g 2lbs = 453.59g x2 = 907.184g 1g = 1000mg 907.184g x 1000mg/ 1g = 907.184 907.184g / 5oomg = 1814.368mg x20 min = 36287.36 36287.36 min 2. A locomotive engine burns 30 kilojoules in 3 hrs. How long will it take the engine to burn 6000 joules in minutes? (1 points) 1kj = 1000j 30kj x 1000j =30,000 3hr-60 min= 180min X= 180min x 6000j / 30,000 = 36 min Make the following conversions of metric lengths: (1.50 points) 3. 445 cm = 0.0045km 4. 32.5 mm = 32500. µm 5. 57,350 nm = 5.735e-5 m 6. Which prefix represents a millionth (0.000 001)? (0.5 point) a. Micro- b. Milli
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- 23 de febrero de 2023
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