Ch 11 Mock Exam Solutions

4 Chemistry is the science of the structure and interactions of matter. The INCORRECT alternative is: D) All living and nonliving things consist of matter, which is anything that occupies space and has mass. Mass is the amount of matter in any object, which does not change. Weight, the force of gravity acting on matter, does change. When objects are farther from Earth, the pull of gravity is strong; this is why the weight of an astronaut is close to zero in outer space.   5. Structure of Atoms: each element is made up of atoms, the smallest units of matter that retain the properties and characteristics of the element. Is CORRECT to affirm that: B) One subatomic particle composed of individual atoms. Only three types of subatomic particles are important for understanding the chemical reactions in the human body: protons, neutrons, and electrons. The dense central core of an atom is its nucleus. Within the nucleus are positively charged neutrons (p+) and uncharged (neutral) protons…

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Dashboard My Home OWLV2 | Online teaching and learning resource from Cengag [References) A student gently drops an object weighing 15.7 g into an open vessel that is full of ethanol, so that a volume of ethanol spills out equal to the volume of the object. The experimenter now finds that the vessel and its contents weigh 10.6 g more than the vessel full of ethanol only. The density of ethanol is 0.789 g/cm°. What is the density of the object? Density = g/cm³ Submit Answer Try Another Version 10 item attempts remaining

7. Air has a density of 0.001226 g/mL. What volume of air would have a mass of 1.0 lb? (1.0 Ig = 454 g) %3D A) 3.7 ml B) 7 mL C) 815.6 mL D) 37 mL E) 3.7 x 105 mL O a O b O c d.

13. The speed of a particular automobile is 45 mph (miles per hour). Use the following relationships to calculate the value in units of km/s (kilometers per second). 1 km = 0.62 mi 1 h = 60 min 60 s = 1 min %3D 14 Na me the following ooidle ond h0808 ond idontifu on i

101 Chem101 You are given a 1.25 gram mixtı x b My Questions | bartleby Get Homework Help With Cheg × + app.101edu.co M Apps G M Gmail YouTube Maps a AMAZON Translate Gflights USCIS ъ ВАТERBLY C CHEGG > KATAPULK CUBA SUPERMARKET23 Essay Writing Ser... G calculator - Googl... Reading List Question 12 of 20 Submit You are given a 1.25 gram mixture of calcium nitrate and calcium chloride. You dissolve this mixture in 200.0 mL of water and add an excess of 0.300 M silver nitrate. You collect and dry the white precipitate which forms and find it has a mass of 0.535 grams. Calculate the percent calcium chloride by mass in the original mixture. | % 1 2 4 C 7 8 9 +/- х 100 + LO

Measurement and Matter Adding or subtracting and multiplying or dividing measurements 0/3 Bishop V A chemical engineer must report the average volume of a certain pollutant produced by the plants under her supervision. Here are the data she has been given by each plant: volume of plant pollutant 49.02 L Oglala Platte Susquehanna 3.35 L 46.84 L What average volume should the chemical engineer report? Be sure your answer has the correct number of significant digits. OL X G ? o0o

shboard My Home C OWLV2 | Online teaching and learning resource from Ceng [References] The population density of worms in a particular field is 33 worms per cubic meter of soil. How many worms would there be in the top meter of soil in a field that has dimensions of 1.50 km by 2.5 km? worms

for forensic chemistry :  If a vehicle with four wheels is traveling in a linear path through soft dirt, how many and which tires would you expect to leave tire track impressions?

Suppose some measurements are made on two different homogeneous stones to find out if they are made of the same kind of rock. The mass and volume measurements are listed below. Are the two stones the same type of rock? Why or why not? Show all calculations. Mass Volume Calculations Stone 1 58.0 g 20.0 cm Stone 2 50.1 g 15.0 cm3 21/common/assets/pdfjs/1.0.0.30/web/viewer.ht...ndered-pdf&fullscreen=Dd21-fileviewer-rendered-pdf-dialog&height=746#0

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3. A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative error caused by this result if the mass of gold in the sample is a. 500 mg​​ b. 250 mg c. 60 mg 4. The method described above is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative error resulting from a 0.4-mg loss is not to exceed a. -0.1% b. -0.8%

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2. Make an ice cube at 1 bar pressure by freezing an amount of liquid water that is 2 cm x 2 cm x 2 cm in volume. The density of liquid water at 0 °C is 1.000 g cm³ and the density of ice at 0 °C is 0.915 g cm³. Note that this difference in density is the reason your water pipes burst if they freeze and why you shouldn't forget to take your bottle of pop out of the freezer if you put it in there to try and cool it down faster. A. What is the work of expansion upon freezing? B. Is work done on the system or by the system?

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…

Best fit line? R^2 value? Density of water?

IA VIIIA 4.003 1.008 VIA VILA He 10.81 12011 14.007 15999 18.998 20.179 MA IVA VA 6.941 9.012 u „Be „B .C N ,0 F Ne 22.990 24 305 „Na „Mg ma VB 26.98 28.09 30.974 32.06 35 453 39948 m Al „Si 1sP S „CI „Ar 39 098 40.08 4496 47 88 50.94 52.00 54.94 5.85 58.93 58 89 63.546 65. 38 69.72 7259 7492 78.96 79.904 8380 „KCaSc zTI V „CrMnFe „Co Ni „CuZn „Ga„Ge As Se „Br Kr 101.1 102 91 106.4 107 87 112 41 114.82 118.69 121.75 127 60 126 90 13129 „Rb „Sr „Y Zr „Nb MoTc„RuRh Pd Ag.cd In „Sn Sb Te l Xe VIIIB VB VIB VIB 21 85.47 87.62 88.91 9122 291 9594 50° 52 132 91 137 33 138.91 178.49 18095 183.85 186 2 190 2 1922 195.08 196.97 200 59 204 38 2072 208 98 44) 210) e22) „CsBa „La zHf „Ta „W „Re„Os ir „Pt Au Hg I Pb Bi „PoAtRn 023) 226 03 227.03 „Fr Ra „Ac 72 73 140. 12 140.908 144 24 (145) 150 36 15196 157 25 158.93 162 50 164.93 167 26 168 93 173 04 17497 „Ce „Pr NdPm SmEu „Gd Tb „Dy „Ho Er „Tm„Yb „Lu G51) 232 04 231036238 03 237 05 Q4) 43) 247) 47) „Th „Pa U Np „PuAm.Cm „Bk Cf „EsFmMdNo Lr 054)…

2.A student is trying to determine the volume of a flask and compare it to the known volume. After performing the measurements 10 times, the student calculates an RSD of 2 ppt, with a percent error of 24%. Which of the following statements about the results are correct?   A. The line fits the points on the calibration curve well.   B. The results are precise and accurate.   C. The results are accurate, but not precise.   D. The results are precise, but not accurate.   E The results are neither accurate nor precise.

As viewed from Earth, most stars appear to move across the sky each night because A stars orbit around Earth   B Earth rotates on its axis   C stars revolve around the center of the galaxy   D Earth revolves around the sun

Run a simulation to determine if buying 23 boxes is unusual

Part 3: Calculate density of a metal an unknown metal. 1. Using the pictures below, record the displayed data in the data table in the report sheet. Make sure to include the right number of significant figures in the measurements and calculations. Mass measurement 7.1 g Volume of water measurement. There's only one measurement here – the larger image is for magnification only. -20 15 m Volume of water and metal measurement. There's only one measurement here – the larger image is for magnification only. 20 m 15