SCI 100 Module Four Activity Template (2)

Chemistry Hello, I'm not sure of my answers, could you please correct me and make a quick observation for each of them?

make a statement of the problem and a hypothesis for both questions, the statement of the problem should be starting with “This capstone research aims to determine_______”

What materials will the teacher and the students need to complete a lesson on mixing substances in a 5th grade classroom based on the below standard and learning objective? Standard Conduct an investigation to determine whether the mixing of two or more  substances results in new substances.  Learning Objective Given a variety of substances and safety equipment in a classroom setting, students will be able to conduct an experiment to mix two or more substances and observe the results. They will be able to correctly identify whether a new substance has been formed as a result of the mixing, based on observable changes such as color change, formation of a precipitate, or change in temperature, with at least 80% accuracy.

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…

Question 11 please

Solve all of them if you can please

In my on-campus Organic Chemistry II Lab, my students make aspirin. The melting point in the literature for aspirin is 134-136°C.   Suppose the sample of aspirin one of my students made has a melting point range of 129-133 °C.  Using this information, answer the following: 1.  Do you think the student made aspirin?  Why or why not? 2.  How could you test your hypothesis?  Explain what you would do and what the results would look like if they made aspirin versus if they didn't.

Time (min The investigator used one of the following substances in this experiment. Melting and Boiling Points of Four Substances Melting Point Boiling Point (°C) Substance (°C) 1 20 100 40 140 3. 70 140 80 160 Which of these substances was used in this phase change investigation? A. Substance 2 B. Substance 4 C. Substance 3 O D. Substance 1

If a liquid contains 60% sugar and 40% water throughout its composition, then what is it called? Multiple Choice solvent compound homogeneous mixture solute heterogeneous mixture

Part 2: Heating Curves HEATING 150°C 100 C so c B 1 400J 800J Energy 1200J 1. What phase is happening in section #1? a. Temperature is b. Energy is 2. What change is happening in section #2? a. Temperature is b. Energy is c. Molecules move and d. The melting point is °C. 3. What phase is happening in section #3? a. Temperature is b. Energy is 4. What change is happening in section # 4? a. Temperature is b. Energy is c. Molecules move and d. The vaporization point is °C. 5. What phase is happening in section #5? a. Temperature is b. Energy is

Classify each phase based on whether it describes a solid, liquid, or gas. Solid Liquid Gas definite volume, no definite shape definite volume, definite shape particles are close together and do not move no definite volume, no definite shape relative to cach other particles may be far apart and particles are close together and can move move randomly past cach other Answer Bank Incorrect

How could you describe the changes that happen when carbon changes form from graphite to diamond? A. It is a physical change, but the intensive and extensive properties of carbon will be maintained. B. It is a chemical change, but the intensive and extensive properties of carbon will be maintained. C. It is a chemical change, which could change some of the intensive and extensive properties of the carbon. D. It is a physical change, which could change some of the intensive and extensive properties of the carbon.

3. Carefully put an egg in a glass half filled with vinegar. Replace the vinegar on the second day. Place the covered glass with the vinegar and egg in a safe place for one week without disturbing it. After one week, pass a light through the egg using a flashlight. N.B. DO NOT BOIL AND EAT THE EGG. A. Results and observation. Equation: HC2H3O2 + CaCO3 calcium acetate + H20 + carbon dioxide B. Calculation: If 9.02 x 1024 particles of vinegar (HC2H3O2)HC2H3O2) is added to 16.5 moles of eggshell (CaCO3) and 6.35 moles g of calcium acetate is formed. What are the (a) theoretical yield, (b) actual yield and (c) percent yield

Try Again Your answer is incorrect. Classify the substance shown in the sketch below. You can click the other tabs in the sketch to get a magnified view. Be sure you check all the boxes on the right-hand side that are correct for this substance. Note for advanced students: in some sketches the distance between particles has been exaggerated to make it easier to see each individual particle. normal substance 1000X 10,000,000X classification (check all that apply) gas liquid solid element compound mixture solution pure substance homogeneous mixture Oheterogeneous mixture X Ś

In a dry test tube, put enough cane sugar to make a layer about 1⁄4 inch deep. heat the tube in the flame while holding a cool inverted beaker near the mouth of the test tube.   Observations:   What is collected in the beaker? Where did this come from? What are the elements present in this substance? What is left behind in the test tube?  What element is it? What elements therefore are present in combination in sugar?

Use the sample experimental data to calculate the mass of water lost    Mass of pan 15.110 g   Mass of pan+ sample before heating 17.452 g Mass of pan + sample after heating 17.107 g Use the sample experimental data to calculate the % of water in sample   Mass of pan 15.110 g Mass of pan + sample before heating 17.452 g Mass of pan+ sample after heating 17.107 g

a)A Boy received a task on indicating which one is diamond or cubic zirconia. They both look exactly the same. What should he do to differentiate these two crystals? Elaborate. b) FIGURE 2 shows a diamond structure. Determine the volume density of the atom if the given lattice constant is 5.45 A. (Given A -1x10^-¹⁰ m).

what is the mass of baker? What is the mass of sodium acetate?