PreLab- Experiment 1

1a) A children's liquid medicine contains 100 mg of the active ingredient in 5 mL. If a child should receive 200 mg of the active ingredient, how many milliliters of the medicine should the child be given? For the purposes of this question, assume that these numbers are exact.  1b)The package states that one teaspoon (tsp) is approximately equal to 5 mL. Calculate the number of teaspoons that the child should receive. Use the given approximation as your conversion factor.

afari File Edit View History Bookmarks Window Help www-awn.aleks.com alex Yahoo Search Results Yahoo Search Results ALEKS O STOICHIOMETRY Using the Avogad ro Number -23 g and a small airplane has a mass of 5000. kg. An aluminum atom has a mass of 4.48 x 10 Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of aluminum atoms? x10 ? X How many moles of aluminum atoms have a mass equal to the mass of a small airplane? Expation Check 2019 McGraw- 80 AUG 19 II

The mass of magnesium used in this experiment is critical to determining the moles of hydrogen gas generated. The analytical balances used in Chemistry 1A labs are very sensitive to point that touching materials with your fingers before measuring them can affect the measurements. The balances are sensitive enough to detect dirt and oils from your fingers transferred to the magnesium. Would your experimental value of R increase or decrease if the mass of magnesium measured was artificially high due the touching it with your hands? Increase Decrease

STPKsYapxmOBQpqJ9sYHEQf udwLFoPO2ojmMGw/edit s Help Last edit was seconds ago B U A G O O- E E E E E E - E - E E 14.5 3 4 5 6 You are asked to perform an experiment to determine the density of square block below. In order to complete your calculations you will need to (AKS 1b, DOK1). Question options: 1. Use the electronic balance to determine the mass of the block. 2. Use water displacement to determine the volume of the block. bD 1. Use the electronic balance to determine mass. 2. Use ruler to measure the length, width, and height to determine volume. C= 1. Use a pipet to determine the mass of the block. 2. Use water displacement to determine to volume of the block. Pr Au 立

when drawing melting point composition diagram for a mixture of something such as cinnamic acid and urea comparing melting point vs composition for organic chemistry, if i have three different compositions (1:4, 4:1,1:1) should i have 3 different graphs or would this all be on the same graph? and how do i convert grams to moles for example for composition 1:4 my data was 0.8003 g : 3.1917 g?

2. The slopes of the lines in graph 1 can be interpreted as a useful quantity around the lab if you were working with water or one of these solutions. Explain the significance of the slope and how it might be used around the lab. Hint: look at the units and remember when a line is drawn it represents a sort of average as it places about half of the data above and below it due to random errors.

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g 9b Given the data and information in the prompt, what is the calculated absolute error on the percent of sugar in the mixture? Enter the absolute error you calculated in the box below. You do not need to include the % symbol with your answer.

a Assume that mitochondria are cylinders 8.00 um in length and 0.800 pm in diameter. What is the volume of a single mitochondrion? The volume of a cylinder is given by the expression: V = n x y2 x h Volume= m

What are replicates in Analytical Chemistry? O The component of a sample that repeats over different assays. Similar assays done to different samples A sample that contains exactly the same amount of analytes than the original sample similar samples that are analyzed at the same time and in the same way

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q3 Given the data and information in the prompt, what is the calculated absolute error on the percent of sand in the mixture? Enter the absolute error you calculated in the box below. You do not need to include the % symbol with your answer.

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 you will use student outcomes to inform future instructional decisions.  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…

Italian salad dressing is a combination of oil, vinegar, herbs and spices. Why does one shake a bottle of dressing before pouring it onto a luscious concoction of local organic greens? Look up numerical values of the densities of olive oil and wine vinegar and cite them in your answer.

Scenario In an investigation, lab groups combine two compounds, as shown below. Based on the data collected from all lab groups, you realize that one group’s data was not possible.     Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)   External Data   Group Number Mass of Mg (g) Mass of HCl (g) Mass of MgCl2 (g) 1 5  15                                     20 2 5 15 17 3 5 15 21 4 5 15                                     20 5 5 15                                    19   Prompt  Make a claim about which group’s data is not possible. Use evidence and scientific reasoning to support your claim. Include a rebuttal in your answer.   Claim (1 sentence): ______________________________________________________________.   Evidence 1 (2-3 sentences):…

The mass of an average blueberry is 0.75 gg and the mass of an automobile is 2200 kgkg . Find the number of automobiles whose total mass is the same as 1.0 molmol of blueberries.

Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you the substance is a pure substance or a mixture, if you can. • Sample A is 100. g of a coarse grey powder with a faint unpleasant smell. 15. g of the powder is put into a funnel lined with a sheet of thick paper. Distilled water is poured slowly over the powder. All of the powder disappears, and the water under the funnel turns a deep purple. • Sample B is a solid yellow cube with a total mass of 50.0 g. The cube is ground to a fine orange powder and added to a 500 mL beaker full of water. The beaker is stirred vigorously. Some of orange powder settles to the bottom of the beaker, and some rises to the top and floats on the water. When the powder at both the bottom and the top of the beaker is filtered out, dried, and weighed, the total mass is measured to be 50.1 g. pure substance Is sample A made from a pure substance or a mixture? If the description of the…

Analytical chemistry studies and uses instruments and methods used to separate, identify, and quantify matter. What analytical technique could one use to determine whether the creatine is in the form of the monohydrate or dihydrate or something in between?Hint: Answer is not elemental analysis, but is a method used in lab in general chemistry.

1a. Throughout the experiment, what are some possible sources of error that could have led to someone recovering a significantly smaller amount of table salt (NaCI) than was originally present in the sample mixture. 16. What are some possible sources of error that could have led to someone to appear to have recovered a significantly larger amount of sand (SiO2) than was originally present in the sample mixture.

Hf728ca7011b52e183d2247#10001 Part A 15. ΑΣΦ The physician has ordered 1.0 g of tetracycline to be given every six hours to a patient. If your stock on hand is 500-mg tablets, how many will you need for one day's treatment? Express the number of tablets as an integer. Submit ? Previous Answers Request Answer 12 of 15 tablets Review | Constants | Periodic Tab

B. Density of Liquid 1. Obtain a sample of distilled water (any quantity of your choice) anddetermine its mass and volume. Record your data on table 3 in theexperimental report 2. Calculate the density of the water sample using equation 1 Substance     Density (g/mL)    Substance     Density (g/mL)Aluminum       2.7                     Lead                         11.3Brass                8.4                      Zinc                     7.1 Copper           8.9                           Cork                        0.26Tin                  7.3                   Silver                                           10.5Bone             1.80                  Rhodium                              12.4Iron             7.9                         Platinum                                     21.45   Density of Liquid Density can be determined in the laboratory by measuring the mass and volume ofa substance. To measure the density of a liquid, first measure the mass of a clean,dry beaker. Then add…

When is sieving and fractional distillation a good method for separating mixtures? Cite an example.

II. BOILING POINT ELEVATION: The temperature of a boiling 50 mL of distilled water in an Erlenmeyer flask with a small flame was taken to be 98°C. The bulb of the thermometer must not touch the bottom or sides of the Erlenmeyer flask. In another Erlenmeyer flask, 2.83 grams of urea is dissolved in 10 grams of distilled water. The solution was let to boil gently and its boiling point was recorded to be 101°C. DATA AND RESULTS: (Show all pertinent computations on the space provided if applicable. Answers with no computation will not be considered.) Mass of urea in grams Mass of water in grams Boiling point of distilled water in degrees Celsius Boiling point of urea solution in degrees Celsius Molecular weight of urea in g/mol (experimental) Molecular weight of urea in g/mol (calculated) Percent Error of Molecular weights of urea Change in boiling point SOLUTION/S:

The compound PClx contains 85.14% chlorine by mass. What is the value of x? Enter your response as a whole number.

Part A.Calculate the percent carbon in fructose, C6H12O6 Express your answer are using to decimal places Part B. Calculate the percent hydrogen and fructose, C6H12O6

Gas chromatography is an analytical technique that is used to separate and analyze samples that can be vaporized without decomposing. The chromatography column contains a substance that helps separate the sample being analyzed. The sample is vaporized and carried through the column by an inert gas. As the mixture moves through the column, the compounds are separated based on how much they interact with the substance in the column. The molecules of each compound are detected as they exit the column, and a peak for each compound is produced on a chromatogram. The area under each peak on the chromatogram is proportional to the concentration of the compound in the sample. A chromatogram produced by separating a mixture of compounds is shown. Time to Go Through Column Based on the information given, which of the following statements about the chromatogram is most likely true? A The three peaks each represent a different element. B The three peaks each represent a different substance used to…

A chemist measures the amount of oxygen gas produced during an experiment. He finds that 6.63 g of oxygen gas is produced. Calculate the number of moles of oxygen gas produced. Round your answer to 3 significant digits. |mol x10 Check Esliglanation O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessiblly 12.39 P 4/7/202 80 F Cloudy DELL PgDn Delete PrtScr Insert F12 F10 F11 F8 F9 F7 Num Lock F5 F6 F4 F2 F3 Esc F1 Backspace & # $4 % 80 @ 4 5 1 T Y W E R Enter * 00

A cough syrup has a density of 1.20 g/mL. A doctor orders 48.0 g of the syrup for a sick child. How many teaspoons (tsp) will you administer to the child? (1 tsp = 5.0 mL). 1) 6.4 tsp 2) 8 tsp 3) 4 tsp 4) 5 tsp