Give an instance where it is allowable to ignore safety protocols. Why?       2. State the proper way of heating liquids using test tube.       3.Which is a more accurate volume-measuring instrument, a graduated pipet or a graduated cylinder?

Q: A sample of an unknown hydrated compound weighed 16.450 grams. After heating, it had a mass of…

A: We have to calculate the percentage of water by mass in the unknown hydrated compound that weighed…

Q: When measuring volumes of liquids, precision volumetric graduates with calibration for measuring…

A: Practical chemistry: As per our guideline we have to answer first question only.

Q: What is the process or name for going from (1) to (3

A: Nucleophilic substitution reactions (NSR) : In substitution reactions in which one nucleophile is…

Q: What is the most accurate way to measure 50 mL of a liquid?  Make sure to mention the process and…

A: Liquid can be measured by the various equipments. Depending upon the amount of liquid , the…

Q: Nanotechnology, the field of building ultrasmall structures one atom at a time, has progressed in…

A: Hello. Since the question has multiple subparts, the first three subparts are solved. In case the…

Q: A graduated pipet is calibrated to? Select one: O a. contain a certain volume of solution O b. use a…

A: Frequent calibration is very important to achieve accurate volumetric results and decreases the…

Q: density of irregular solid mass of irregular solid 9.039 g initial volume 68 mL final volume 74…

A: Given , Mass of irregular solid = 9.039 g Initial volume = 68 mL Final volume = 74 mL Total volume…

Q: any grams ore prosent in 5.39 modes

A: Given: The moles of AgNO3, (n) = 5.39 mol. The molar mass of AgNO3, (M) = 169.87 g/mol.

Q: 20. Another name for a homogeneous mixture is

A: Answer: SOLUTION is the another name of homogeneous mixture

Q: How would you determine if a shot put used at the olympics was of the correct material?

A: Shot is a ball made up of a specific metal iron or brass.

Q: You are required to analyze the semiconductor wastewater samples containing with cadmium. A sample…

A: A question based on qualitative analysis of cations that is to be accomplished.

Q: ISO 9000 is a series is a a. quantity management standards b. qualification management standards c.…

A: ISO 9000 is a series of quality management standards.

Q: Volumetric measuring devices may be stamped as TD (to deliver) or TC (to contain). Which of the…

A: The inscription of TD means ‘to deliver’ and TC means ‘to contain’. These inscriptions are helpful…

Q: Which common inexpensive metal was more valuable than gold in the nineteenth century?

A: Solution:       Aluminum is considered as the third most abundant element in the earth crust after…

Q: A chemist wishes to test the effect of four chemica agents on the strength of a particular type of…

A:

Q: a. Describe the arrangement and movement of particles in each of the three states of matter. Use…

A: Given :  a. Describe the arrangement and movement of particles in each of the three states of…

Q: Question attached

A: External standard method: An external standard is like the internal standard (known behaviour), but…

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: When is decantation applicable in separating solids from liquids

A: When the liquid has to be separated leaving the solid behind in a liquid mixture, then decantation…

Q: One cubic meter 1 m³ of aluminum has a mass of 2.70×10³ kg.and 1 m³ of iron has a mass of 7.86×10³…

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Q: what solvent would you use to determine the density of zinc chloride

A: Zinc chloride is soluble in polar solvents like water. Hence, a non-polar and no reactive solvent is…

Q: What are two precautions you must observe when using the electronic balance

A: Electronic balance is used to meothe weight of compound in labs.

Q: What information is important to those who will be analyzing the samples?

A: Various types of analysis of compounds are performed in chemistry. These analysis helps in finding…

Q: If water weighs 1000 kg per cubic meter, determine the total weight of th water that a 1-meter…

A: The radius of cylindrical tank is 0.5 m. The volume of a cylinder is calculated using the following…

Q: Two liquids, A and B are immicible. Liquid A has a density of 0.89 g/mL. Liquid B has a density of…

A: The solution is given below -

Q: What volume of iron (7.87 g/cm3) would be  required to balance a 1.25 cm3 sample of lead (density…

A: Mass = Density x Volume

Q: For question number 2 does that mean weigh the dish to 0.001g without clearing it ?

A: In step-1, after cleaning the evaporating dish properly, we have to heat to remove any impurities…

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: answer with the correct number of significant figures but without "%" (Canvas will not let you to…

A: Here we calculate all required data from the information. Please see carefully the answer, last two…

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: Sources of Error Determine the relationship between the observed/apparent value (EX) VERSUS that of…

A: To determine relationship between observed/apparent value (EX) vs. ET by writing <, > or = on…

Q: an empty via weight 65.32g. if the vial weights 195.62 when filled with liquid mercury (d=13.53gcm³)…

A: Density of liquids is calculated by dividing their mass by the volume they tend to occupy.

Q: Why does the temperature on the thermometer decrease after collecting the first fraction before…

A: collecting the cycling gloves inflection adjust the so that the rate of distillation is about One…

Q: Define the term unit conversion problems?

A: Unit conversion: It is defined as the conversion of units of some measurements into another units.…

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: With the aid of a diagram (hand-drawn), describe the process of filtration?

A: Defination: Filtration is defined as the process of separation from a solid or liquid mixer.

Q: A 25 mL pipet delivers 24.7761 g H2O which is weighed against brass weights at 25°C. Calculate the…

A:

Q: I am allowed to work with someone...Using the Volumetric Pipet Data from Part C calculate the: 11.…

A:

Q: Can you give 5 laboratory apparatuses examples on each classifications?

A: A. Measuring type : In laboratory many measuring cylinder are used. These are used to measure liquid…

Q: a) Define the following petroleum fingerprinting. (iv)Conversion (v) Separation

A: There are several phases in the petrol refining process.  In that, there are two processes that are…

Q: L Using your textbook or othor resouce, write the accepted relationship between the inch and the…

A:

Q: a) Define melting point. b) Is melting point a physical or chemical property of matter?

A:

Q: Why is water used to caliberate a thermometer  why is the temperature of an ice bath and a boiling…

A: To assign a value to a particular temperature, thermometers are calibrated.  Hence, we need to take…

Q: What do you call the liquid that separates from the solids in the a) decantation method? What do…

A:

Q: Write about material testing in chemistry (main categories with examples)

A: A question about material testing in chemistry, which is to be accomplished.

Q: Before proceeding to the analysis, the ____________ of the sample must be considered. a. size b.…

A: Answer: In the chemistry lab, samples are often being analyzed to gather the certain information…

Q: Standardization of a Solution lab Discuss two possible sources of error for this experiment

A: The  question is based on the concept of titrations. We have to determine the possible sources of…

Q: Write the names of these laboratory equipment (A,B and C) in the below image.

A: We have to give name of equipment of laboratory

Q: The best result depends on the accuracy and precision. Define precision and state the formula.

A: Precision is the closeness or repeatability of results.