An_intervention_presentation._T7_SCN-620

When something cannot be directly obeserved, it can be represented by a Group of answer choices Model Graph Hypothesis Theory

A group of students performed a melting point experiment to study the physical properties of ionic and covalent solids. The data collected are shown in the table.  Solid Sample Melting Point (oC)  Time Elapsed (min) Table Sugar (sucrose) 186 18 Table Salt (sodium chloride) 500 (not observed) 30  Paraffin Wax 37 4  Vegetable Lard 50 >5 Using the information contained in the table, what is the BEST explanation for the results?A    The melting point of sodium chloride was not observed because ionic solids do not melt, whereas sugar, wax, and lard melted because they are softer than salt.B    The melting points of covalently bonded solids tend to be lower than ionic solids. The melting point of sucrose was greater than the wax or the lard because sucrose has stronger bonds than wax or lard.C    The melting point of sodium chloride was not observed because ionic solids are composed of positive and negative ions that do not melt; whereas, the…

100- 8 8 Relative Intensity $ 20- 0- Relative Intensity 10 200- 80- 40- 20- 0- 10 20 30 m/z 20 20 100 $10 Chlorine OR Bromine OR Neither Chlorine OR Bromine OR Neither 90 100 100- Relative Intensity DO- ģ 20- 0 100 80 10 8 Relative Intensity 3 0- 10 40 30 60 15 m/z Chlorine OR Bromine OR Neither 35 40 45 m/z weytekakumpumakija 30 100 110 55 Chlorine OR Bromine OR Neither

NHẠNO3 MgSO4 [1] Mass of salt (g) 1.968 1.981 [2] Volume of DI water (mL) 50.0 50.0 0.039 0.0396 Mass of DI water (g) [3] Temperature of DI water (°C) 22.5 22.5 [4] Temperature of mixture after dissolution (°C) 19.5 27.1 3 4.6 Temperature difference (°C) [5] Total mass in reaction (g) [6] Enthalpy of solution AHsolution (cal/mol)

Current Attempt in Progress From the curves shown in Animated Figure and using the following Equation, determine the rate of recrystallization for pure copper at the several temperatures. Make a plot of In(rate) versus the reciprocal of temperature (in K-1). (a) Determine the activation energy for this recrystallization process. (See Section FACTORS THAT INFLUENCE DIFFUSION.) (b) By extrapolation, estimate the length of time required for 50% recrystallization at room temperature, 20°C (293 K). (a) i kJ/mol (b) i days

This is my 2nd attempt to receive help with this problem. The previous expert confused me by saying the answer is less than 109.5? Does that mean it should be 90?  Please provide clarity instead of adding confusion; otherwise the payer loses a question for assistance.  Thank you.

Jollibee Burger     Item                             Sodium(mg)                Fat(g)              Calories           Item cost($) Beef Patty                               50                                17                   220                  $0.25 Bun                                         330                             9                      260                  $0.15 Cheese                                     310                              6                     70                   $0.10 Onions                                     1                                  2                     10                    $0.09 Pickles                                     260                              0                      ,. 5                   $0.03 Lettuce                                    3                                  0                      4                      $0.04 Ketchup                                   160                              0                      20…

Find one pertinent analytical procedure for each of following questions relating to food safety analysis. Question 1: The presence of lead, mercury and cadmium in canned tuna Question 2: Correct use of food labelling

Each point on the graph displays the amount of carbohydrates and calories found in ; cup of different vegetables. A line-of-best fit is also shown. 25 20 15 10 1 2 3 4 Carbohydrates (in grams) 5 Which linear equation best represents the line-of-best fit shown? O y = 3x – 4 O y= 4x + 3 O y 4r 6 O y = 5x +7 届 Calculator Calories

Four individuals are suspects in a car theft. A small amount of blood was left in the car, likely from when the thief forced the window. The blood sample was amplified and compared to samples from the suspects. Lanes I, II, III, and IV are the samples from the four individuals. The lane marked "evidence" is the sample from the car. I II III IV Evidence - Which suspects, if any, can be eliminated? II and III II and IV I and IV I, III, and IV I and III I, II, and III Incorrect

Explain your rationale for using the summative assessment (below) from the lesson plan on mixing substances in a 5th-grade classroom based on the below standard and learning objective, including how it aligns with the learning objective.  Summative Assessment  Summative: Components of the Lab Report Purpose: The student should clearly state the purpose of the experiment, which is to determine whether the mixing of two or more substances results in new substances. Procedure: The student should describe the steps they took to conduct the experiment. This includes the substances they chose to mix and the safety equipment they used. Observations: The student should record any observable changes that occurred when the substances were mixed. This could include a color change, the formation of a precipitate, or a change in temperature. Conclusion: The student should state whether a new substance was formed based on their observations. They should also reflect on their accuracy in…

Dissolution Distilled H20 Concentration 0.01 M HCI Concentration (mg/ml) Time Total amount A Total amount A (mg/ml) (mg) (mg) 5 0.16 0.1 10 0.24 0.18 15 0.35 0.25 20 0.48 0.34 25 0.58 0.4 30 0.67 0.5 1. Plot the given data on an ordinary paper and find the slope for each line then calculate the IDR constant for aspirin in the two dissolution media, water and HCI. NOTE: Slope of the calibration curve = 1.0 (mg/ml and saturation solubility of salicylic acid is equal to 2.0 gm/L.

Need all three plz

Chemical properties include (choose the best answer) Melting and boiling point Density Reactivity with other chemicals and molecules Solubility in various solvents

How can I solve this question? I need full detail and accurate answer.

Please answer question number 2  correctly with the correct answer. there is a picture of an example of a ''Dimensional analysis Format' below. please write out all work showing the math in dimensional analysis format. (please show all work)   Question 3: What is the molar mass of each of the following compounds?   A. C6H12O6   B. NaHCO3

Good day! Can you help me make a SCHEMATIC DIAGRAM to separate the components of a given mixture?  Please do explain the process step by step and why you have chosen that method/s for the separation. Thank you

A 106.2 mL sample of 0.100 M methylamine ( CH3NH2; Kb = 3.7 x 10-4) is titrated with 0.235 M HNO3. Calculate the pH after the addition of each of the following volumes of acid.

What is the difference between a decigram balance and an analytical balance?

It is always important to label everything in the dispensary or the medicinal chemistry laboratory. One student made aspirin and the other student made paracetamol. Both students left their unlabelled samples near the balance. Give details of two techniques that you could use to distinguish between these samples

What constitutes a 'reference material', and why does its utilization play a critical role in the chemical analysis of food products? Provide examples.

2. Show solution. Thanks!