Experiment #7 - Accuracy & Precision

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You were asked to watch a video where a small amount of water was placed into a can on a hot plate. After time, it was inverted into ice water. Why did the can implode? Edit View Insert Format Tools Table 12pt v Paragraph v |BIUAv D2

1. What are the principal natural processes that affect the petrophysical properties of sedimentary rocks? 2. As shown in Table 1.1, the total bulk chemical analysis of rock samples is clearly different from the surface analysis. What effect does this have on the rock properties?

A polymer looses 40% of its strength in 10 days and 50% in 20 days. How many days will it take to loose 60% of its strength Please provide detailed answer.

Wet deposition is a continuous process, while dry removal of air pollutants can be realized only in the presence of precipitation. a. True b. False

Ceramics used as abrasives must be hard and tough and be able to withstand high temperatures that arise from frictional forces. What is the minimum required hardness (measure in Mohs scale) for a material to be used as abrasive? Your answer

III. PROCEDURE A. Activity Proper 1. Given the experimental data below. Temp Time Temp °C Time Phase Phase Present Present Ice (solid) liquid Starting Temp 15 28 solid Solid, liquid Solid, liquid Solid, liquid Solid, liquid Solid, liquid Solid, liquid liquid liquid liquid liquid liquid liquid liquid 16 35 1 1 17 42 2 1 18 48 3 1 19 53 4 1 20 59 1 21 65 6. 1 22 71 (heat is apply) Solid, liquid Solid, liquid Solid, liquid Solid, liquid Solid, liquid Solid, liquid Solid, liquid liquid At 40-45 minutes liquid is converted into gas liquid Liquid, gas Liquid, gas Liquid, gas Liquid, gas Liquid, gas Liquid, gas Liquid, gas 7 23 75 8 10 24 77 9 11 25 81 10 11 26 85 11 11 27 88 11 16 20 89 91 93 12 28 13 29 14 30 1. Construct a heating curve using the experimental data above. Label the following points on the graph above: Phase change between solid and liquid as "A." Phase change between liquid and gas as "B." Heating the liquid as "C." Conclusion Based on experimental data, how do temperature…

Write "TRUE" if the statement is correct. Else, write the correct answer based on the underlined word(s). 4) Diethyl ether and water are miscible and can spread on each other's surface based on their spreading coefficient.

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

According to Riippi et al. (1998), briefly discuss the effects of increased compression force to the following tablet properties: Disintegration time Surface profiles (as seen on SEM photographs)

A student wants to determine how different factors affect the rate of dissolving a solid in water. The student will test: the size of the particles, the temperature of the water and the amount of agitation or stirring.

Determine phosphate concentration of a water sample using the following information: Standard curve- slope: 1763.2 y-int: 0.011806 R^2: 0.99181 Absorbance of water sample: 0.013

Answer number 11 to 20 pls.

Read the scenario below. Identify what is inappropriate lab behavior in each instance. Then write the appropriate lab safety technique. Kendra is heating a test tube for an experiment using a Bunsen burner. She didn't put on safety goggles since she already wears glasses. She tilts the test tube mouth away from her towards her lab partner, since the steam keeps fogging up her glasses.

i need help solving this step by step with all the calculations  Below is a set of absorbance data that you have obtained while doing an experiment studying the diffusion of potassium permanganate into solutions of water. This diffusion experiment was conducted at three temperatures. I need help to Calculate the diffusion rates for each of these temperature conditions.  Time (min) 4°C 22°C 37°C 0 0.024 0.108 0.081 5 0.048 0.144 0.221 10 0.069 0.196 0.321 15 0.088 0.224 0.424 20 0.086 0.234 0.580 25 0.089 0.248 0.683 Once you calculate your diffusion rates  in standard notation and use 3 digits past the decimal point   (Note that the last zero is considered to be a digit)    Diffusion Rate 4°C =  __________________  Diffusion Rate 22°C = _________________  Diffusion Rate 37°C = _________________     To show how you calculated the diffusion rates for these temperature - What absorbance values did you choose to…

In which option is the order showing whether the questions given below are true or false? (  ) Airborne humectants are generally called hygroscopic substances. (  ) Removing water from solids can be done by heating your sample in the oven just below its melting point. (  ) Drying capacity is a measure of the drying efficiency of the dryer. (  ) Drying intensity is the amount of water held by 100 grams of dryer. (  ) For the phenomenon called "blooming" to occur, the vapor pressure of the hydrate system must be higher than the partial pressure of water in the air. A. Right, Wrong, Right, Wrong, RightB.Right, Right, Wrong, Wrong, RightC.Right, Wrong, Wrong, Wrong, RightD. Right, Wrong, Wrong, Right, RightE.Right, Right, Wrong, Wrong, Right

#13-15 Choose the letter of the correct answer.

Vacuum desiccators are more efficient than ordinary desiccators because _____. (a) The low pressure will increase the condensation rate of the water molecules (b) Vacuum dessicators works just as well as ordinary ones. (c) The vacuum created inside the drying chamber will pump out the liquid (d) Moisture and other liquids would evaporate faster lower pressure

I need the answer as soon as possible

A student wants to determine how different factors affect the rate of dissolving a solid in water. The student will test: the size of the particles, the temperature of the water and the amount of agitation or stirring. Investigation Particle size Temperature (°C) Stirring 1 medium 40 no 2 Extra large 40 yes 3 medium 40 yes Which investigation will have the highest rate of dissolving and why? Use evidence to explain your answer. Format BI U ...

In reference to surface chemistry, define dialysis.

To ensure that you are not confused, I attached what the experiment was about. I highly recommend you read through it before going to the questions. file:///Users/michaelzheng/Downloads/MeasuringEnergy%20(1).pdf

Which of the following is true about strain? A It is the ability of the material to absorb force until fracture B It is dimensionless and is the ability of the material to absorb force until fracture It is dimensionless It can be evaluated as the force applied per area

5. Enumerate the uses, advantages and limitations of a glass versus a plastic volumetric pipette.

Why is it important to always let hot objects cool before weighing? Convection currents that surround a hot object can interfere with the weighing process. It is safer for people to handle cool objects than hot objects. A plastic weigh boat or weighing paper may be damaged by a very hot sample.

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…

Station 2: Density column In the graduated cylinder, you have molasses, water (blue), corn oil, and ethanol (red). They have the following densities: Substance Molasses Water Corn Oil Ethanol Density 1.45 g/mL 1.0 g/mL 0.92 g/mL 0.79 g/mL Polarity Polar Polar Nonpolar Polar Viscosity High Low Low Low 1. Explain why the column is arranged in the order it is according to density.

2. Explain how suction filtration is carried out in the laboratory. Give the important points that must be observed in doing the process.

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