Shivani Gosine FS_9002_L07_Fractography

What should be worn in a laboratory at all times to decrease the likelihood of eye injury?What should be done if a chemical gets in the eye?

5. Which tablet size and the liquid combination resulted in the fastest dissolution times? A. crushed, room temperature water B. crushed, hot water C. crushed, room temperature vinegar D. broken, hot water E. broken, room temperature vinegar 6. What is the relationship between particle size and the time it takes for the tablet to dissolve? A. direct proportion B. inverse proportion C. combined proportion D. joint proportion 7. Using the activity as a model, how does mechanical weathering (breaking or crushing) contribute to chemical weathering (dissolution)? A. Increases size of particles B. Decreases dissolution time C. Increases surface area D. Both A and B E. Both B and C

What are the uses of Laboratory Apparatus below: 1. Aspirator or Pipette Bulb 2. Evaporating Dish 3. Mortar and Pestle 4. Graduated Pipette 5. Acid Burette 6. Spatula 7. Stirring Rod

1.give some precautionary measures in the use of microscope 2.List the part of the microscope and give its function 3.definition of patrol 4.history of traffic 5.Early mode of transportation

7. Describe two ways to fold a filter paper to be used for filtration. Include diagrams for the step-by-step preparation of the filter paper.

MRI machines primarily work using ____.a. The nuclei of carbons in fatty acid chainsb. The nuclei of oxygen atoms from water molecules in the bodyc. The nuclei of hydrogen atoms from water molecules in the bodyd. The nuclei of radioactive isotopes injected into the body

Fill in the blanks: Silica ____ has a larger surface area than particle type ___

Compare and Contrast any two microscopy techniques.

The Biorefining process involves a number of steps. Select all that apply a. grinding it into sand size particles b. adding chemicals to dissolve the powdered waste into a solution c. microbes are added that latch onto the metal by selective biosorption. d. microbes are filtered and refined into a solid e.microbes are recycled for a new batch

fill in blanks and solve using the emthod shown! please

Graphene is a __________? a. metallic nanomaterial b. carbon nanomaterial c. quantum dots d. metallic nanoparticles

Question 33 Which of the following will give a negative deviation to Beers Law? I. polychromatic radiation II. presence of stray light III. presence of particulates on the sample O A. Il and III only B. I only OC. and Il only O D.I and III only

Mineral Properties (Color, Luster, Streak, Diaphaneity, Magnetism, and other Properties) Research Part 2 A. Enumerate five other properties of minerals that is dependent with light and explain each Part 2 B. Which is more reliable to use in identifying minerals, streak or color? Defend your answer. Please put reference.

15. Why are safety data sheets important? SELECT ALL

9.If we have three containers with water at different temperatures and in each one we drop 5 drops of vegetable dye, in which one will the dye diffuse faster? Immersive Reader A) 80°C B) 37°C C) 15°C D) diffuse equally

Which of the following will give a negative deviation to Beers Law?  I. polychromatic radiation II. presence of stray light III. presence of particulates on the sample A. I and II only        B. II and III only        C. I and III only       D. I only

Posttest Direction. Read the questions carefully. Write the letter of the correct answer. 1. Water exists in three states of matter and continuously moving through a cycle on Earth. At which stage in the water cycle does water transform from a gas to a liquid? a.evaporation c. precipitation b. condensation d. Sublimation 2. Carbon dioxide (CO2) forms when coal burns in the presence of oxygen. Which of the following is the BEST evidence that a chemical reaction occurs when the coal burns? a. Production of mechanical energy c. A new substance is produced b. Production of electricity d. Formation of precipitate 3.Which of these does NOT happen during a chemical change? a. New substances are formed with different chemical properties. b. Attractive force between atoms of molecule formed or break. c. The chemical properties of the substances before and after the reaction are the same d. Energy is always released or absorbed. 4. A granular substance is added to a liquid. Which of the…

SUBJECT : GENERAL CHEMISTRY  TOPIC : Pre-Lab on Adhesion and Cohesion

Charcoal is a good absorbing agent due to its large surface area that can attract particles to its surface True, charcoal can attract particles that can pass through its pores True, the surface area of the charcoal makes it more exposed to the material to be absorbed False, charcoal does not have a large surface area False, the particles cannot be absorbed but will only stick to the surface of the charcoal

1.To allow the separation of solids from liquids with heating , the best apparatus is: Select one : a. Mortar and pestle  b . Watch glass  C. Evaporating dish d. Funnel 2.To easily heat and ignite solids , use : Select one  a. Watch glass b . Crucible with cover  C. Test tube d. Evaporating dish   3.Solid chemical reagents are generally placed inside Select one  a. Dark - colored plastic bottles  b. Plastic bottles C. Flint bottles  d. Amber bottles

Sublimation is preferred over recrystallization when you work with an amount of solid material to be purified that weighs: A) at least 1 kg B) about 100 mg C) about 1 mol D) about 1000 ml A OD

Please answer all items. Will give you thumbs up and good rating.  Matching type

Which of these statements is not true for levigation? Select one: a. process of making paste b. uses a spatula by mixing the ingredients on a slab following the figure 8 c. uses electrically operated grinders d. used to incorporate solids into dermatologic, ophthalmic ointments or suspensions

Why is paper used for weighing dry, non-hygroscopic chemicals only? Why is watch glass used otherwise?

how does the intermolecular force of attraction lead to stain removal?state reference

Which of the following is NOT true? Select one: a.SEM is used to analyze the chemical composition, structure, and shape of nanoscale materials. b.SEM can resolve features both inside and outside the focal plane. c.SEM magnification and resolution is limited by diffraction. d.SEM uses an electron beam rather than light.

Please answer the slide #02. Thank you

Which of the following correctly describes the stationary and mobile phases for a reversed-phase HPLC separation? a) polar stationary phase, polar mobile phase b) non-polar stationary phase, non-polar mobile phase c) polar stationary phase, non-polar mobile phase d) non-polar stationary phase, polar mobile phase

This section in a Safety Data Sheet contains information on the density, evaporation rate, pH value, and flashpoint of the material, among others. * Physical and Chemical Properties Handling and Storage Stability and Reactivity O Accidental Release Measures

15. Can provide a protective effect against UV is a quality characteristic of cosmetics on the side…. A. eficacyB. usabilityC. safetyD. stability

12. Please write clearly