Chem119-Exam4-practice-answers

73. ZnO              _________________________       74. AsCl3           _________________________   75. H2CO3(aq)   _________________________       76. KrF4             _________________________   77. Ba(ClO3)2    _________________________       78. IF3                _________________________   79. AlN              _________________________       80. CsH              _________________________   81. UF6               _________________________      82. CS2               _________________________   83. BN               _________________________       84. CO               _________________________   85. Pb(NO2)4     _________________________       86. Al(OH)3       _________________________   87. Mn(OH)2   _________________________          88. FeI3           ________________________

History stry Bookmarks X O8 https://app.101edu.co FEB 13 Tools Window 80 Aktiv Chemistry F3 Balance the following chemical equation (if necessary): Si₂H3(s) + O₂(g) → SiO₂(g) + H₂O(g) 1 $ + Reset Help SIO₂ O F4 X 04 03- 3 0₂ 03 ) + F5 Question 40 of 47 0²- 4 0 ↑ H₂O < 0- 5 05 □+ ALL F6 6 0 1 MacBook Air 2 2+ & 7 Si₂H3 07 (s) (1) (g) (aq) 4 F7 8 9 0 08 09 Do • x H₂O 4+ ♫ A * 0₂ FB Delete tv w O O DD F9

The law of conservation of mass states that matter cannot be created or destroyed

← X g 單 0 Priva Tern C My Account - MySam - Sam Hou X Content X Q mathway calculator - Search https://shsu.blackboard.com/ultra/organizations/_202946_1/cl/outline LI Lets start with the medical components. We need to determine how many units of the syringe connections can be made out of one metric ton of PEI, or around 2205 lbs of the plastic. X M Mathway | Basic Math Problem S X + 1 metric ton = 2205 lbs Starting material - PEI 1 metric ton ≈ 2205 lbs Calculation for number of units of each component: total weight of starting material PEI X Products Medical components Stopcock with Luer Connection, 1-way, male lock unit weight 2.72 g = 3/500 lbs 1 unit of medical component 1 weight of unit of component This calculation assumes all starting material is used during the production of the components. Medical components Products Stopcock with Luer Connection, 1-way, male lock unit weight 2.72 g 3/500 lbs Female Luer Lock 3/16" unit weight 0.63 g 7/5000 lbs Units = If necessary round to the…

Chemical & Physical Properties Review

View History Bookmarks Develop Window Help A east.cengagenow.com [References) 1 pt EXERCISE Unit Conversion 1 pt Drag conversion units onto the boxes in the equation to make conversions. Some boxes can be left empty. Click on a unit to remove it from its position. 1 pt 1 cm³ Cu 9 g Cu 9.5 x 1021 atoms Cu 1 g Cu 1 pt 1 kg 1000 g 1 cm = 1 mL 1 pt 1 L 1000 cm3 1 pt 1 pt 520 L x 1 pt 1 pt 1 pt A piece of copper has a volume 520 L. What is the mass of the sample, in units of grams? In the boxes above, enter the correct setup that would be used to solve this problem. 1 pt 1 pt Check Next (2 of 3) 1 pt 1 pt Submit Answer Try Another Version 2 item attempts remaining 1 pt

Which two options describe behaviors of particles that are related to the chemical properties of the materials?

Please could you help me Balance the following chemical equations

E Copy of Fall 2020 Fina X hHp8TPKsYapxmOBQpq19sYHEQfKQudwLFoPO2ojmMGw/edit d-ons Help Last edit was seconds ago BIUA c 田回。三=== 三ニ三▼E 三E X Arial 14.5 2 3 4 6 A student needs to identify an unknown substance found in the lab based on its physical properties. The substance has a mass of 130.5 g and a volume of 36.73 ml and tarnishes when it comes in contact with water. (AKS 2b, DOK2). Density e/cm3) 0.42 0.95 0.36 3.71 0.30 1.12 0.20 0.69 Name Cherry Alloy Cuppric Alloy Elastica Aloy Galvanized Alloy Holy Alloy Marblic Alloy Porous Alloy Silica Dioxica Alloy Stuper Alloy Trisphereica Alloy Vulcan Alloy Zink Alloy 0.62 246 1.88 3.55 Question options: A.The unknown substance is Cherry Alloy. The student was able to use the reactivity to solve the problem-because tarnishing is a physical property of the Cherry Alloy. B. The unknown substance is Vulcan Alloy. The student was able to use density to solve the problem because density is a physical property of Vulcan Alloy. C.The unknown…

The periodic law states that elements in the same _____________ will have similar physical and chemical characteristics

Question 21, thank you

maining Time: 21 minutes, 27 seconds. estion Completion Status: aLY OAC'K. QUESTION 25 Show all your work on a sheet of paper to solve the following significant figures. You can earn partial credit for this problem What is the mass in grams of 4.75 x 1044atoms of Ne? PE 1. IA 2 1.0079 IIA 4 Be Li 2.

A education.wiley.com + Chapter 3 9 of 20 く - / 1 Calculate the theoretical percentage compositions for NO %N = i % %O = i NO2 %N = i %O = i

Use the data listed in the supporting materials to calculate the equilibrium constant, Kp, for the synthesis of HCI at 298.15 K. H2(g) + Cl2(g) =2 HCI(g) 4.0 2.47e33 What is the value of Kp if the equilibrium is expressed as below? 1/2 H2(g) + 1/2 Cl2(g) = HCI(g) 4.0

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4) __ H2 + O2 0 H20 HCI O Pb(OH)2 + AIBR3 + Al2(SO4)3 5) H20 + PbCl2 6). K2SO4 O KBr + 7) CH4 + O2 0 CO2 + H2O 8) _ C3H8 + 02 O2 0 СО2 + H20 9). C3H18 + O2 CO2 + H20 10). FeCl3 + NaOH Fe(OH)3 + Nac

B File Paste E + Home Insert Cut E Copy 4 Page 1 of 1 Format Painter Clipboard 0 words S Draw Design Layout References Calibri (Body) BIU Uabe X₂ abe X₂ X² 11 À A Aa A A Font P Type here to search Mailings English (Philippines) Accessibility: Investigate jo E•E•S• Review View Help HE e W Document1 - Word €¶ Paragraph 1-27. Noble gases (Group 18 in the periodic table) have the follow- ing volume concentrations in dry air: He, 5.24 ppm; Ne, 18.2 ppm; Ar, 0.934%; Kr, 1.14 ppm; Xe, 87 ppb. (a) A concentration of 5.24 ppm He means 5.24 µL of He per liter of air. Using the ideal gas law in Problem 1-16, find how many moles of He are contained in 5.24 µL at 25.00°C (298.15 K) and 1.000 bar. This number is the molarity of He in the air. (b) Find the molar concentrations of Ar, Kr, and Xe in air at 25°C and 1 bar. S ■ Tell me what you want to do AaBbCcDc AaBbCcDc AaBbC AaBbCct AaB AaBbcct AaBbCcD Normal 1 No Spac... Heading 1 Heading 2 Title Subtitle Subtle Em... Styles DI Sign in 1:37 (Ctrl)…

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-2 -1 0 +1 +2 +3 +4 +5 +6 +7 將門路 ?? 5NO2 + 6H+ + 2MnO4 R9 555 5NO3 + 2Mn+² + 3H2O Reset Help

5. TRUE or FALSE a) Chemical reaction is an example of chemical change. b) Rusting of iron shows a chemical reaction. c) Chemical change and physical change are the same.

Carbon-14 Half-Life 120 100 80 60 40 20 5000 10000 15000 20000 25000 30000 Time in Years the ratio of carbon-14 to carbon-12, what is the approximate age of the bone? 8 If a fossilized bone is found with Amount of Carbon-14 Remaining (%)

PL03 141 PM Sun Apr 17 24) Order: Potassium Chloride 75meq p.o. daily Supply: potassium Chloride 15 meq per 10 mL 220 mL Calculate the dosage in fl-oZ Connect CAPS 4 Ch ** F12 Esc F1 F3 F4 F5 F6 F7 F8 F11 23 $ % & 3 4. 7 9 %3D Q W Y U

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Matter or pure energy? soda taste soda color air humidity scent x-rays

A computer flashdrive has a mass of 3.45 g. What is the mass of the flashdrive in decigrams (dg)? A) 0.345 dg B) 34.5 dg C) 345 dg D) 3,450 dg

sion In ý College Board-SAT O Reading list >> My Profile- Zoom Results of the chec My Citation Ilist 9/2 me-AP Student O Elk Grove Unified Constants | Periodic Table Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25 kg of room-temperature water (about 25 C). You figure that you can boil water to 100 C on the stove and pour it into the bath to raise the temperature Part A How much boiling water would you need to raise the bath to body temperature (about 37 "C)? Assume that no heat is transferred to the surrounding environment. Express your answer to two significant figures and include the appropriate units. • View Available Hint(s) HẢ Value Units Submit Part B Complete previous part(s) Provide Feedback Next > P Pearson Copyright © 2021 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | e A 10:13

Properties and Changes of Matter Reset Help carving wood slicing an apple burning wood tearing aluminum foll bleaching skin snow melting frying an egg oxidizing of mercury (Hg) Physical change Chemical change Suhmit

Which practice is NOT used to gauge accuracy? raw data and results from calibration checks B. fortification recoveries (c quality control samples blank samples E sample replications