exam 1 summer 2023

Can you help me with questions 4, 5, 6, and 7 please?

Answer number 1-4 pls. I don't want to waste my money here.

Use the References to access important values if needed for this question. Read the data points from the graph and complete the table below. 25 20 15 10 3 Submit 3. 2.

Provide a short description of multiplicity and give an example of how it relates to someone life. 150 words minimum

Real-World Chemistry 1. Suppose you wanted to ship bananas from Puerto Rico to New York and the time required for shipment was 8 days. Will you choose to ship ripe bananas or green bananas? Why? 2. You may have heard the saying "One bad apple will spoil the whole barrel." Based on the results of | your experiment, do you think the statement may be true? Why?

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…

McGraw Hil ALEKS CHEMISTRY-Gener... esc E ! 1 MEASUREMENT AND MATTER Adding or subtracting and multiplying or dividing measurements Explanation -1 gml1 Q A 1 A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 1.500 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 96.6 g. She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 97.7 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant…

I. Data Record data with units. A. Standardization of KMnO4 1. Mass of beaker/paper + ferrous ammonium sulfate Empty Beaker Beaker and Sample Sample 1 7.40709 8. 4800g Sample 2 7.4364g 9.19498 Sample 3 7.46.324 8.48993 2. Buret readings Initial Reading Final Reading Sample 1 0.00mL 27.00m L Sample 2 21.6 mL 29.5mL Sample 3 33.5mL 29.3mL Mass of Sample 1.0439 0.45269 1.0259 Volume KMnO 27.00mL 27.40 mL 25.8ML

ackboard XCO 用 Remaining Time: 1 hour, 09 minutes, 34 seconds. Question Completion Status: QUESTION 14 Match the symbol with the correct definition. A. a measure of the amount of substance v g B. a measure of distance v mol C. a measure of mass D. a measure of time E. a measure of temperature v K F. a measure of volume QUESTION 15

8 - 14 please

In a gravimetric determination of lead content in brass, there is a constant loss by solubility of 1.55 mg of lead. A sample contains 7.86% by mass lead, and a 0.3514-g sample is used for the analytical determination using the gravimetric method. Calculate the % relative error. *Watch the units. **Provide your answer to two decimal places and without units. Avoid using scientific notation.

•All groups will add nystatin (an antifungal) to their tubes. The stock concentration is (50 mg/mL). The final concentration will be 50 µg/mL. ● • Calculate how much nystatin will be added to your TSA tubes. Each 15 mL TSA tube will get final concentration of 50 µg/mL. The …... will be used. Pipettor Blue Yellow Grey Volumes 100 - 1000 μL 10 - 100 μL 1-10 μL μL of nystatin to give a pipettor

Pls pls pls solve this accurate pls it's very very important so pls solve accurate

To make 250 ml of 100mm NaCl, weigh ______ grams of NaCl, place in a graduated cylinder, and add water to make the total volume _____ mL.

Volumetric measuring devices may be stamped as TD (to deliver) or TC (to contain). Which of the following devices would you expect to be stamped with both TC and TD? a. pipette b. graduated cylinder c. beaker d. Erlenmeyer flask

Can you please solve #9,10,11  show all of your steps and explain how you do it, the second picture is my work I was trying to do but I don't know if my work is right. SHOW ALL YOUR WORK IN PICTURES! DO NOT TYPE IT. THank you !

A piece of aluminum foil has a known surface density of 15 g/cm2. If a 100-gram hollow cube were constructed using this foil, determine the approximate side length of this cube.a. 1.05 cmb. 1.10 cmc. 2.6 cmd. 6.67 cme. 15 cm

Laboratory 2 Report Sheet-Lab 2 A.2 Area Your measurements Length = Width = Area = (Show calculations.) Why could two students obtain different values for the calculated areas of the same rectangle? A.3 Volume of a solid by direct measurement Shape of solid Formula for volume of solid 18 Height Width Another student's measurements Volume of the solid (Show calculations of volume including the units.) Length Diameter (if cylinder) Page 3 of 3 482 words 区

Please help with 7&8

2 Fe + Oz →2 FeO 1. The numbers in red boxes are... A. subscripts B. coefficients C. reactants D. products 2. The chemicals in the purple box are... A. subscripts B. coefficients C. reactants D. products