Chem119-Exam1-practice-noanswers

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           ________________________

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

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

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

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.

Question 21, thank you

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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…

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

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

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

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

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 (%)

Chapter 1, End of the Chapter, Active Learning Questions, Exercise 57 The dosage for an antibiotic is prescribed at 8.0 mg per kilogram of body weight, taken twice daily for two weeks. What total mass of antibiotic will be taken by a 180-lb person for the two-week period?

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)…

2. In a Mars Direct mission, the astronauts would return home in an Earth Return Vehicle (ERV) fueled by     methane and oxygen produced from terrestrial hydrogen and Martian CO2     helium-3 extracted from the lunar surface     finely-ground Martian rocks accelerated by an electromagnetic mass driver     cheap, traditional kerosene fuel brought from Earth   We might go back to the Moon someday to mine the lunar surface for an energy resource called     methane     antimatter     hydrazene     helium-3

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

Chemical & Physical Properties Review

what is an atom? What is it characteristics? How does an atom live and exists in the biosphere?

B. 1

Is the following a chemical change, physical change or both? Explain. the ability to digest food

What is the key difference between an element and a com-pound?