(There are some questions on the pictures)5 Question:In the lab a substance is studied and the following observations are made.At room temperature (20 °C) the substance has the following properties:1. It is a solid that is shiny and silver in color.2. It has a density of 1.738 g/mL.3. It is malleable (it can be pounded into a flat sheet).4. It is ductile (it can be pulled into a thin wire).5. It is a good electrical conductor.The substance is subjected to some further experiments and these additional observations are made.6. It melts at 649 °C.7. It boils at 1105 °C.8. It burns in air, glowing with an intense white light.9. It reacts with bromine to give a brittle white solid.6 Question:Classify each of the following as a pure substance or a mixture. If it is a mixture is it homogeneous or heterogeneous?i. sea waterii. ice cubesiii. lemonadeiv. He gas Hint:6/8/20217.See Pure Substances.Question:A 112.6 g mass of unknown material is submersed in 102 mL of water to yield a final volume of 126 mL. What is theapparent density of the unknown material?Hint:8.Chapter: 1 Lesson: 8https://genchem.science.psu.edu/sites/default/files/fileKU4jx09.What is the definition of density?Chapter: 1 Lesson: 8Question:If one mole of acetone has a mass of 58.1 g, what is the mass of 0.015 millimoles (mmol) of the acetone? Express youranswer in nanograms using the correct number of significant figures.Question:Week 1 HomeworkChapter: 1 Lesson: 8When your body metabolizes sugar (glucose), 2.8 MJ of heat is produced for every mole of sugar that is burned. Howmuch heat will be released when 0.25 moles of glucose in a can of soda is metabolized? Express your answer in kilojoules(kJ) using the correct number of significant figures.MacBook Pro2/3 1.Question:Hint:1. How many seconds are in a millisecond (ms)?2. How many mL are in a μL?3. How many kg are in 0.0034 g?4. How many nm are in 0.25 cm?2.Hint:3.Chapter: 1 Lesson: 81Question:Put the following measurements in order of increasing length.0.0010 kmWhat is the relationship between each metric prefix and the base unit?106 cm1.0 x 108 μm.4.Chapter: 1 Lesson: 8Question:Can you rewrite each of these numbers with a common unit (meters for example)?Chapter: 1 Lesson: 8What is the answer to the calculation below to the correct number of significant figures?(1.025) (1.63) (94.0+18.13-4.6)8.925Chapter: 1 Lesson: 8A 1.9 x 10-2B. 1.97 x 10-2C. 2.0 x 10-2t= 20.12949552Question:What is the result (to the correct number of significant figures) of adding 1.17 x 102 and 8 x 10-³?D. 0.02E. None of the above answers is correctMacBook ProPage <1>

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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(There are some questions on the pictures) 5 Question: In the lab a substance is studied and the following observations are made. At room temperature (20 °C) the substance has the following properties: 1. It is a solid that is shiny and silver in color. 2. It has a density of 1.738 g/mL. 3. It is malleable (it can be pounded into a flat sheet). 4. It is ductile (it can be pulled into a thin wire). 5. It is a good electrical conductor. The substance is subjected to some further experiments and these additional observations are made. 6. It melts at 649 °C. 7. It boils at 1105 °C. 8. It burns in air, glowing with an intense white light. 9. It reacts with bromine to give a brittle white solid. 6 Question: Classify each of the following as a pure substance or a mixture. If it is a mixture is it homogeneous or heterogeneous? i. sea water ii. ice cubes iii. lemonade iv. He gas

1.
Question:
Hint:
1. How many seconds are in a millisecond (ms)?
2. How many mL are in a μL?
3. How many kg are in 0.0034 g?
4. How many nm are in 0.25 cm?
2.
Hint:
3.
Chapter: 1 Lesson: 81
Question:
Put the following measurements in order of increasing length.
0.0010 km
What is the relationship between each metric prefix and the base unit?
106 cm
1.0 x 108 μm.
4.
Chapter: 1 Lesson: 8
Question:
Can you rewrite each of these numbers with a common unit (meters for example)?
Chapter: 1 Lesson: 8
What is the answer to the calculation below to the correct number of significant figures?
(1.025) (1.63) (94.0+18.13-4.6)
8.925
Chapter: 1 Lesson: 8
A 1.9 x 10-2
B. 1.97 x 10-2
C. 2.0 x 10-2
t
= 20.12949552
Question:
What is the result (to the correct number of significant figures) of adding 1.17 x 102 and 8 x 10-³?
D. 0.02
E. None of the above answers is correct
MacBook Pro
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