CHEM101L Lab Exam 1

Question 20

Question 19

Question 21

8 - 14 please

For number 19, I feel I am not doing it correctly. What is the steps and answer to number 19?

Please answer both questions?

26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about 36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons. Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving assumptions you make in this calculation rea L-36 Tile fiDw ill it cost2 The density of gold is 27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50

Arrange the values according to magnitude. Greatest Least Answer Bank 7.6 x 10-6 3.3 x 10-2 9.0 x 10-6 51000 1.5 x 105

< STARTING AMOUNT X The distance between the centers of two oxygen atoms in an oxygen molecule is 1.21 x 10⁰ cm What is this distance in nm ? ADD FACTOR x( ) 10-⁰ 0.121 10-7 1.21 x 10 1.21 x 10-4 100 10² Question 18 of 46 nm 10-⁰ 1 0.0121 ANSWER 1.21 x 10-15 0.01 10⁰ 1210 1.21 x 10- RESET 1.21 10⁰

Dipping into health When blood pressure is measured over a 24-hour period, this is referred to as ambulatory blood pressure monitoring, three patterns arise. Here are samples of three different individual. Let's call them Dick (1), Tom (2) and Harry (3). 1 2 3 Patient's Paticnt's BP BP Palicet's Upper limit Upper limit 12 Upper lim 124 120 Lower limit Lower Lower limit Time (houn after wakening) Time (hours after awakening) Time (hours after awakenin SYSTOLIC BP (mm Hg)

Concentrated sulphuric acid is used in this experiment to O help the crystal growth of acetylsalicylic acid speed up the reaction of aspirin synthesis increase the activation energy O avoid impurities getting trapped into the aspirin crystals P Type here to search

Using this chart : Time (seconds) [PHT] ln[PHT] 1/[PHT] 0 0.005000 -5.298 200.0 10.5 0.004500 -5.404 222.2 22.3 0.004000 -5.521 250.0 35.7 0.003500 -5.655 285.7 51.1 0.003000 -5.809 333.3 69.3 0.002500 -5.991 400.0 91.6 0.002000 -6.215 500.0 120.4 0.001500 -6.502 666.7 160.9 0.001000 -6.908 1.000E3 230.3 0.0005000 -7.601 2.000E3 *Your x-axis should be "time"zero order: time vs [PHT]first order: time vs ln[PHT]second order: time vs 1/[PHT]Enter the absolute value of both slope and correlation into the table below. Order slope correlation 0     1     2

In a particular class, exams are worth 50%50% of the overall grade, quizzes are worth 30%30% of the overall grade, homework is worth 15%15% of the overall grade, and class participation is worth 5%5% of the overall grade. A particular student has earned an average score of 83.0%83.0% on the exams, 71.6%71.6% on the quizzes, 90.0%90.0% on the homeworks, and 100.0%100.0% on class participation. What is this student's overall grade in the course? Report the answer with one digit after the decimal point.

Arrange the values according to magnitude. Greatest     Least Answer Bank 7.1×10−6 3.3×10−2 52000 9.0×10−6 2.2×105

Chemistry

Rank the values according to magnitude. Please see screenhot. Can someone help me understand this?

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-2 -1 0 +1 +2 +3 +4 +5 +6 +7 將門路 ?? 5NO2 + 6H+ + 2MnO4 R9 555 5NO3 + 2Mn+² + 3H2O Reset Help

The Covid-19 pandemic has many experts commenting on the science associated with the virus - origins, vaccines, monoclonal antibodies, masks, social distancing.  It is important to consider what the experts say, but to also evaluate their statements.  We will start with the scientific method.  I want you to outline the scientific method from what you have been taught in previous classes.  You can list steps, parts, process, short descriptions, whatever.  If not taught in previous classes, then you will make your best guess about it.

2 W S Type your answer to the following: Consider the steps the student took in the following scenario. Then describe anything the student did wrong and how it would have affected the student results (too high, low, or unchanged) and why. X A student forgot to weigh the filter paper prior to filtering the salt from the sand. To make up for this, the student weighed a different filter paper from the box and used that mass in the calculations. Edit View Insert Format Tools Table 12pt Paragraph # 3 80 F3 E D $ 4 C 888 R LL F BI U % 5 V F5 T G MacBook Air 6 F6 Y B T² & 7 H F7 A U N * 00 8 J 1 ( 9 M K O F10 L X P

A human hair is 75 um across. How many inches is this? STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) %D 0.01 100 10 1 1x 10° 1 x 10-6 0.1 2.54 1 x 106 0.33 0.001 0.003 3.0 1 x 10-9 75 1000 0.00003 in mm cm um 30

The Bay of Fundy in Nova Scotia, Canada is reported to have the largest tides in the world with high tide and low tide occurring two times per day. The tides can measure over approximately 50.0 ft in height. At the Hopewell Rocks at Hopewell Cape, on a specific day height increase was recorded as a rate of 6.08 feet per hour . What is the rate in meters per second ?