For safety purposes, it is advisable for individuals with long hair to cut their hair short before entering the laboratory. Wearing a laboratory gown over one's clothes when performing experiments inside the laboratory is not necessary.
Q: What is one example of systematic error that can occur in an experiment and one example of random…
A: The difference between true value and an measured value of an experiment is known as errors. If any…
Q: Which statement is incorrect? Select one: a. To ensure accurate readings of a buret, the buret must…
A:
Q: What is the first step in the scientific method?
A: The first step in the scientific method is given below:
Q: The image above shows a student mixing two chemicals. Is she following safe laboratory practices?…
A: We are given an image of a girl mixing two chemicals:
Q: A 1.00 m long beam of stainless steel with a square 2.00 cm X 2.00 cm cross-section has a mass of…
A: Length = 1.00mWidth = 2.0cm = 0.02mBreadth= 2.0cm = 0.02m
Q: what is chemistry? why is it reliable, flexible and testable?
A: Chemistry is a branch of science, which deals with systematic study of structure, composition and…
Q: 4. How sizing down to Nano affect material properties?
A: Since substances at the nanoscale level have a greater surface-to-volume ratio, which causes them…
Q: How can a liquid be distinguished from a fine powder? What type of experiment or observation might…
A: Both are made up of small particles. Perhaps the particles in a powder are larger than those of a…
Q: What does simple distillation data from the same mixture would look like? 2. Why does the…
A: As you not specify so I am giving answer of second question collecting the cyclohexene fraction…
Q: If the caffeine concentration in a particular brand of soda is 2.91 mg/oz,2.91 mg/oz, drinking how…
A: The caffeine concentration in the soda is 2.91 mg/oz. A single can has 12 oz.The amount of caffeine…
Q: Why are laboratory safety rules important?
A: While working in the laboratory as a chemist it is very necessary to be familiar with your…
Q: In the filtration step, the product is washed with "two 4 ml portions of ice-cold water". Explain…
A: Filtration is a type of physical separation method. In this method usually solids are separated from…
Q: What is 320*150
A:
Q: A 1.00 m long beam of stainless steel with a square 2.00 cm×2.00 cm cross section has a mass of 3.02…
A: The length is given as 1m and the cross sectional area is 2 cm x 2 cm. The mass is given as 3.02 kg,…
Q: In any chemistry laboratory course, apparatus and equipment are essential to perform the required…
A: CUTTING OF GLASS TUBE AND GLASS ROD Material Required• Soda-glass tube: 15 cm long• Soda-glass rod:…
Q: 1. Define tensile strength? 2. Why is it important to test the tensile strength of materials? 3. The…
A: 1. Usually when a material comes under stress or strain it tends to break.So the ammount of load or…
Q: Give an example of each filtration and distillation?
A: ANSWER IS DISCUSSED BELOW :
Q: A 1 gallon bottle of a certain brand of bleach costs $2.19. Determine the cost to buy enough bleach…
A: unit coversions.
Q: 1. What are the classifications of laboratory apparatus?
A: Laboratory apparatus are very important for learning practical knowledge of chemistry. Its like…
Q: 2. What’s the main purpose of the glass shields on an analytical balance? A. To calibrate the…
A: The main purpose of the glass shields on an analytical balance is to remove the air current so that…
Q: Volume of water in gradudated cylinder:33.8 mL Volume of water plus pellets:41.8 mL Volume of…
A: Given Volume of water in gradudated cylinder:33.8 mL Volume of water plus pellets:41.8 mL
Q: Is it true that you need to take 30.4 mL of concentrated HCl (23 °Be, density=1.1885 g/mL,…
A: Given density = 1.1885 g/mL molar mass of HCl = 36.5 g/mol we know, molarity = density molar…
Q: These are components of a sample that is of interest to the chemist, usually taken as a…
A:
Q: In order to find the density of a solution of unknown density, 10 mL of solution was drawn into a…
A: Density = mass / volume.
Q: The white blood cell concentration in normal blood is approximately 12,000 cells/cubic mm. How many…
A:
Q: An empty Erlenmeyer flask weighs 235.6 g. When filled with water (d = 1.00 g/cm3), the flask and its…
A: Given, Mass of flask = 235.6 g Mass of flask + water = 571.3 g Density of water = 1.00 g/cm3
Q: A student dissolves a Jefferson nickel to make 100.00 mL of solution in a volumetric flask. The…
A: Mass of Copper in Jefferson nickel used for making the first solution is taken as ‘x’ g.Hence,…
Q: What are the Safety Measures/ Precautions in the Science laboratory and classroom while doing a…
A: In this question we need to answer what are the precautions or safety measures that must be kept in…
Q: Which of the following gives the best description of what the scientific method is? It is the…
A: A scientific method is an empirical method that involves careful and systematic observation,…
Q: What volume of iron (density 7.87 g/cm3) would be required to balance a 2.80 cm3 sample of lead…
A: Given- Density of iron = 7.87 g/cm3 volume of lead sample = 2.80 cm3 (V1) Density of lead = 11.4…
Q: A microorganism contains 0.0000046 g of vanadium. Express this amount in scientific notation.
A: Introduction- Scientific notation is the way of representing large decimal numbers in a smaller way.…
Q: B) What do you know about the chemistry of polymers.
A: Introduction : The term polymer can be defined as the very large molecules having high molecular…
Q: What kind of mixture of substance has Distillation and Chromatography has?
A: There are different type of separation techniques or methods, which are used to separate the mixture…
Q: For safety purposes, it is advisable for individuals with long hair to cut their hair short before…
A: This question describes the safety rules that should be followed in the laboratory. A laboratory…
Q: The liquid substances mercury (density – 13.6 g/cm³), water (density = 1.00 g/cm) and cyclohexane…
A: In a mixture given of different liquids, the heavier liquid (high density) always forms lower level…
Q: To wire your stereo equipment, you need 3450 millimeters of speaker wire that sells for $0.16/ft.…
A: Using the conversion: 1 ft = 304.8 mm Therefore, 3450 mm would be: 3450 mm = 3450 mm304.8 mm× 1 ft=…
Q: Suppose you were measuring out an organic liquid, and some of it is evaporated after you have…
A: The density of the substance is calculated by the relation shown below. Density=massVolume
Q: How can you differentiate between natural and engineered nanoparticles in the environment?
A: The nanoparticles which occur in nature are called Natural Nano particles. These are generally found…
Q: Is distillation a good method for separating a mixture of water and hexane? Why or why not?
A: distillation, process involving the conversion of a liquid into vapour that is subsequently…
Q: "Systematic errors typically affect accuracy whilst random errors generally affect precision”. Do…
A: Accuracy means if we are performing any experiment and if we get a true value(expected value) than…
Q: Common Laboratory Equipment DI
A: Since you have posted multiple apparatus, the labelling of first three apparatus are given. Kindly…
Q: What is analytical chemistry in your own words? How do you differentiate analytical chemistry from…
A: Analytical chemistry can be used for the detection of chemical compounds.
Q: What do you call the liquid that separates from the solids in the a) decantation method? What do…
A:
Q: 1. Give an example to applications of chemistry in engineering
A: Chemistry is used in the field of engineering directly or indirectly.
Q: To determine the concentration of iron in an unknown sample, a chemist analyzed the sample five…
A:
Q: The Calcium content of a banana sample was homogenized and measured. Are the results comparable? Do…
A: Analytical chemistry is the branch of chemistry which deals with determination of constituents of a…
Q: thickness
A:
Q: 1.23 Which separation method is better suited for separating asolution of sugar and water into pure…
A: We know that the given solution mixture that is solution of sugar and water is a homogenous…
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- Explain the laboratory rules for waste disposal.In a few lines, describe the IMMENENT IMPORTANCE of “Green Chemistry" and its importance to Society.(4) Treatises are (a) A comprehensive presentation of broad area of chemistry. (b) Books of comprehensive discussions of contemporary knowledge in a limited field. (c) Contain complete reports of the research work that are done for advanced academic degree. (d) The paper of conference may be published in a separate volume rather than journals. (5) Aldrichimica Acta is an example on periodical published by (a) Chemical and scientific societies (b) Private companies (c) universities (d) Private industries
- The air in a recently used classroom 9m x 7m x 9m tested 0.12% carbon dioxide. How many cubic meters of fresh air must be admitted per minute in order that 10 minutes later it shall contain not over 0.06% carbon dioxide. Fresh air contains 0.04% carbon dioxide. Assumeimmediate mixing of fresh with stale air. (A) 14 (B) 11 (C) 15 (D) 19 (E) 17Is it acceptable to recycle the containers of hazardous chemicals? Why or why not? Explain your answer within the context of chemical safety.Describe the purpose of pictograms of safety in the chemistry lab. Provide examples ofcommon pictograms and explain their meanings