Concept explainers
Identify each activity, a to f. as an observation, a hypothesis. An experiment, or a conclusion.
Lucia wants to develop a process for dyeing shirts so that the color will not fade when the shirt is washed. She proceeds with the following activities:
a. Lucia notices that the dye in a design fades when the shirt is washed.
b. Lucia decides that the dye needs something to help it combine with the fabric.
c. She places a spot of dye on each of four shirts and then places each one separately in water, salt water, vinegar, and baking soda and water.
d. After one hour, all the shirts are removed and washed with a detergent.
e. Lucia notices that the dye has faded on the shirts in water, salt water, and baking soda. whereas the dye did not fade on the shirt soaked in vinegar.
f. Lucia thinks that the vinegar hinds with the dye so it does not fade when the shirt is washed.
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
EP BASIC CHEMISTRY-STANDALONE ACCESS
- The Chemistry in Focus segment titled Dr. Ruth—cotton Hero discusses the enormous contribution of Dr. Ruth Rogan Benerito to the survival of the cotton fabric industry in the United States. In the discussion, it was mentioned that Dr. Benerito became a chemist when women were not expected to be interested in, or good at, scientific subjects. Has this attitude changed? Among your own friends, approximately how many of your female friends are studying a science? How many plan to pursue a career in science? Discuss.arrow_forwardScientific models do not describe reality. They are simplifications aid therefore incorrect at some level. So why are models useful?arrow_forwardIt is the chance or probability that a person will be harmed or experience an adverse health effect if exposed to a hazard. Single choice. a. harm b. hazard c. risk d. severityarrow_forward
- Which substance can be separated by filtration? A. Compound B. Element C. Mixture D. Solution Which is an example of physical property of matter? * A. Baking a cake B. Cooking of gelatin C. Melting of ice D. Rusting of metal Which is an example of chemical property of matter? A. Digestion of food B. Evaporation of water C. Sublimation of moth balls D. Condensation of water vapor Which is a physical property of matter? A. Combustibility B. Corrosiveness C. Density D. Reactivityarrow_forwardStarting with question 2 up to question 4arrow_forwardWhich of the following is a heterogenous mixture? A. raisin bran B. milk C. coffee D. air E. sugar waterarrow_forward
- A piece of aluminum foil has a known surface density of 15 g/cm2. If a 100-gram hollow cube were constructed using this foil, determine the approximate side length of this cube.a. 1.05 cmb. 1.10 cmc. 2.6 cmd. 6.67 cme. 15 cmarrow_forwardI need help on this it’s hard and I keep trying but it still don’t work.?arrow_forwardTrue or False? * Qualitative and quantitative data gathered via laboratory experiments is one of the pillars of chemistry. Accurate and repeatable data are essential for good science.* Unused chemicals shouldn't be put back in their original containers to prevent contamination. Never dispense more than is necessary, too a. Statement A is correct and statement B is incorrect. b. Statement A is incorrect and statement B is correct. c. Both statements are correct. d. Both statements are incorrect.arrow_forward
- Which of the following observations is quantitative in nature? Choose one or more. A. The material melts at 70 0C temperature. B. Half of the sample is colored blue. C. The sample is colored purple. D. Only ninety percent of the material melts at 70 0C temperature.arrow_forward7. What is a pure substance that is only made of type of atom? A. Element C. Compound D. Elixir B. Suspension What is a molecule that is made of atoms of two or more elements chemically 8. bonded together? A. Heterogeneous B. Heteronuclear C. Homogeneous D. Homonuclear 9. Which best describes heterogeneous mixtures? A. They must always be made of liquid components. No gas or solid components. B. The components must always be mixed or dispersed uniformly within the same physical state. C. The components are always visible and distinguishable from the other components. D. All of the options are correct. 10 Which best describes a homogenous mixture? A. They must always be made of liquid components. No gas or solid components. B. The components must always be mixed or dispersed uniformly within the same physical state. C. The components are always visible and distinguishable from the other components. D. All of the options are correct. 11 Which method would be the most effect to separate…arrow_forwardWhich of the following statements are TRUE about research experience and knowledge? a. Research does not involve the process of inquiry. b.Research experience will always result to negative feedback. c. Solutions to problems merely resolved through beliefs, guesses or theories. d. Human experience is always considered as a rich and practical source of knowledge.arrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning