The most appropriate measurement for this block is: 1 2 '3 4 5 6 7 8 9 10 cm a) 3.95 cm b) 4.0 in c) 4.0 cm d) 4.00 cm All of the following properties of a sample of a pure substance can be used for identification except, a) mass b) density c) melting point d) solubility in water

Which part of the description of a compound or element refers to its physical properties and which to its chemical properties? (a) Calcium carbonate is a white solid with a density of 2.71 g/cm3. It reacts readily with an acid to produce gaseous carbon dioxide. (b) Gray, powdered zinc metal reacts with purple iodine to give a white compound

20 draps I drop=to miso,08ML = i mi Mores H,U- MasSS a,77 x103 MMall 18,02 x2.77x103) =|.67 X1021 If this drop of water was stretched so that the individual molecules would line up end-to-end, how long (in miles) would that line be? (1 molecule of H,O = 2 x 10-10 m, 1 km = 6.2 x 10 mile) A metal (M) forms a compound with the formula Ml4. The compound contains 71.00% I by mass. Ider the metal in the compound by name. .1-4126.9o x Loo 71:507.l6 2071x=507.6-3te0.394 0,71

wu.aleks.com/alekscgi/x/Isl.exe/1o_u-lgNslkr/J8P3)H-lQUHIQg6bJxmeSyVpHOEB1plef9xyC5Ca9QldFNDUsAt.. Tp O STATES OF MATTER 三D Calculating volume percent composition 0/5 A chemist prepares a mixture of ethanol and water at a temperature of 23.0 °C. He measures out 38.5 mL of ethanol and mixes it with 38.2 mL. He measures the volume of the solution after it is well mixed and finds that it is 73.6 mL. The density of ethanol is 079 g/mL and the density of water is 1.0 g/mL. Calculate the volume percent of ethanol in this solution. Be sure your answer has the right number of significant digits. db %(v/) 10 Ar Explanation Check 2022 MGraw Hill LLC All Rights Resurved Terms of Use Prvacy Center Accessibility 9:21 FM 378 /2022 DELL Esc F2 FS F6 F7 FB F10 F11 PrtScr Delete PgUp (PgDn F12 Insert Home End 23 $4 & Num Lock Backspace 7 E R Y P. G K Enter 5 *00

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

1.) In the Dumas method for determining the molar mass of an unknown volatile liquid, a sample of a volatile liquid that boils below 100 oC is vaporized in a boiling water bath and the mass of the vapor required to fill the flask is determined. The following data was collected:  Flask Volume 100.0 +100.0 + 79.6 mL = 279.6 mL Mass of Flask + Cap 143.85 g Mass of Flask + Condensed Liquid 144.95 g Mass of Condensed Liquid 1.10 g Temperature of Water Bath (oC)  84.1 oC Barometric Pressure (atm) 0.985 atm   a.) What is the molar mass of the unknown?  b.) What will its temperature be when the pressure is 1.20 atm and the volume is 250.0 mL?

1 Which is NoOTa property Used to identity substances? A Density B. Electrical Properties C Mase 2.2A/company cotects eans to recyciel Some cans aremade'of álumntniumn and others are ade of steel What pitysical property couldbeused to separata and classfy the differerit tyses of cans?* O A Magnetism O B Shape C Size DSolubility

2. Give the answer with correct sig.figs.: 332.57 +24.668 x 2.38 =

What is the difference between a homogeneous and a het-erogeneous mixture?

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