Chapter 1, Problem 1.116E

How do you solve this from start to finish?       A monolayer containing 3.21 × 10 –6 g of oleic acid has an area of 20.0 cm 2. The density of oleic acid is 0.895 g / mL. What is the thickness of the monolayer (the length of an oleic acid molecule)?   a. 1.79 × 10¯7 cm   b. 1.44 × 10¯7 cm   c. 5.75 × 10¯5 cm   d. 5.58 × 10¯6 cm   e. 7.17 × 10¯5 cm

49) Calculate the length of a copper wire having a diameter of 0.200 cm and a mass of 15.620 g. The density of copper is 8.92 g/cm3. (Given: volume = 7 d2 L/4, where p = 3.14, d = diameter, and L = length) A) 1.80 x 10-4 cm B) 4.00 x 10-4 cm C) 1.75 cm %3D %3D %3D D) 5.50 × 10-2 cm E) 55.8 cm

And a regular sample of zinc has a mass of 23.21g. The sample is carefully placed in a graduated cylinder of water with an initial volume of 18.75 mL. What is the final volume of the water and zinc? The density of zinc is 7.140 g•cm ^-3. A. 19.06 mL B. 3.25 mL C. 22.00 mL D. 165.7 mL

Q1. In the photo. Q2. A small tumour is growing exponentially with a doubling time of 15 days. If the tumour currently has 1.3 million cells, how quickly is the number of cells increasing.

11. Calculate the area ofa circle with a radius of 10.0 m. Express your answer in square centimeters ( cm?). A = r² .

Part B: Heating Curve for Water Volume of water: 100 mL B1. Data table for heating curve for water Temperature Time Temperature (°C) Time Temperature (°C) Time (min) (min) (°C) (min) 21 95 1 12 13 2 26 13 98 34 14 98 4 42 15 99 5 16 qa SC 6. 17 99 67 7. 73 18 qa 8. 19 9. 20 10 93 21 B2. Graphing the heating curve for water 120 107 100 80 60 40 36 24 20 10 15 20 25 Time (Min) B3, Initial water temperature °C B4, Final water temperature °C B5. Temperature change (AT) °C B6. Volume of water mL Mass of water B7. Number of calories needed to boil water cal (Show your calculations) Q3. Use heating curve for water graph to answer the followings. (a) How long it takes for the temperature to rise to 65 °C? (b) What is the temperature of water after 8 minutes and 30 seconds? Temperature (°C)

1. 23.78 hg = kg 2. 3423 L= cL %3D 3. 9.643 Mm m 4. 34,000,234 nm dm 5. 10.753 us = S 6. 9.65 kg = 7. 5.37 cm^3 = g mL 8. 19.88 km nm 9. 5397.8 mL cm^3 10. 763.79 cm^3 = L

Pellets of a certain substance are found to weigh 18.75 g. A volume of 13.5 mL of water is added to a graduated cylinder, followed by the pellets. The volume is observed to rise to 14.5 mL. Use Table I below to identify the substance. Table l.  Densities of Selected Solids (at 20 oC)  Material                  g/cm3 Material                  g/cm3 Magnesium            1.7 Zinc                         7.1 Silicon                     2.3 Steel                        7.8 Glass Beads            2.6 Nickel                      8.9 Aluminum               2.7 Gold                         19 Titanium                 4.5 Platinum                   21   Question 4 options:   Glass Beads   Silicon   Titanium   Zinc   Aluminum   Steel   Nickel   Magnesium   Gold   Platinum

A student determined the density of a solid to be 2.90, 2.91 and 2.93 g•cm–3. If the actual density of this solid is 2.70g•cm-3, how should the student's results be described?a. High accuracy and high precisionb. Low accuracy and high precisionc. High accuracy and low precisiond. Low accuracy and low precision