Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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1. A student wanted to find the density of an object of unknown composition with a volume of
5.50 0.05 cm³. The mass of the object was 19.255 0.005 g. What is the density of the object,
including the absolute uncertainty?
a. 3.500 ± 0.3 g cm³
b. 3.500 ± 0.03 g cm?
c. 4.259 ± 0,6 g cm¹
d. 4,259 ± 0,06 g cm³
1. Convert 168 nm3 to ft3.
a.5.93 x 10exp-16 ft^3b.5.93 x 10exp-24 ft^3c.5.22 x10exp22 ft3d.6.00 x10exp-15 ft3
A Solid has the volume of 22.6 cm3 and density of 8.75 g/ cm3 Calculate the mass in mg
A.) 1.98 x 10exp5 mg
B.) 1120 mg
C.) 4.32 x 10exp4 mg
D.) 1.27 x 10exp12 mg
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- b. The Moon is 3.9 x 105 km from Earth's center and 1.5 x 108 km from the Sun's center. The masses of Earth and the Sun are 6.0 x 1024 kg and 20 x 1030 kg. respectively, Find the ratio of the gravitational fields due to Earth and the Sun at the center of the Moon. c. Calculate the force of gravity that the Earth (mass 6.0x1024 kg) and the Moon (mass 7.4 x 1022 kg) exert on each other. The average Earth-Moon distance is 3.8 x108 m.arrow_forwardHow 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 cmarrow_forward0.009 hm = %3D cm 1.0023 dm = hm %3D 0.2203 daL = µL %3D 515 cm = kmarrow_forward
- Convert 3.00x10-2cm to mm. Group of answer choices A. 3.00x10-1 mm B. 3.00x101 mm C. 3.00x102 mm D. 3.00x10-3 mmarrow_forwardAnd 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 mLarrow_forward49) 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 cmarrow_forward
- 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.arrow_forwardPellets 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 Platinumarrow_forward1. 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 = Larrow_forward
- 11. Calculate the area ofa circle with a radius of 10.0 m. Express your answer in square centimeters ( cm?). A = r² .arrow_forwardConversions involving units raised to a power: include the correct number of significant digits. a. 5.00 mm^3 to cm^3 b. 75 acres to m^2 c. 4637 nm^3 to in^3arrow_forwardPart 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)arrow_forward
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