Results for "mass"

chapter 10 mass wasting

Physics - 1.5 - Gravity and Mass

Commonwealth of Massachusetts Review

CMN 140: Introduction to Mass Communication

massive econ

Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 14. Which of the following compounds would you expect to be ionic? A) SF6 B) H2O C) H2O2 D) CaO 15. Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g) + 3H2 (g) à 2NH3 (g) A 9.3-g sample of H2 requires ____________ g of N2 for a complete reaction. A) 43 B) 1.3 x 102 C) 3.9 x 102 D) 4.6 16. What is the frequency of light (s-1) that has a wavelength of 1.23 x 10-6 cm? A) 3.69 B) 2.44 x 1016 C) 4.10 x 10-17 D) 9.62 x 1012 17. Which sketch represents an orbital with the quantum numbers n = 3, l = 1, ml = 0? A) B) C) D) 18. What color of visible light has the longest wavelength? A) blue B) violet C) red D) yellow 19. According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both the position and the __________ of an electron. A) mass B) color C) momentum D) shape 20. The wavelength of a photon that has an energy of 5.25 x 10-19 J is ___________ m. A) 3.79 x 10-7 B) 2.64 x 106 C) 2.38 x 1023 D) 3.79 x 107 21. There are ___________ orbitals in the second shell. A) 2 B) 4 C) 9 D) 18

Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 5. Which of the following molecular formulas is also an empirical formula? A) C6H6O2 B) C2H6SO C) H2O2 D) C6H6 6. What is the coefficient of O2 when the following equation is completed and balanced? C4H8O2 + O2 à ______________ A) 2 B) 3 C) 5 D) 6 7. Analysis of a compound shows that it contains 3.75 moles of C, 7.50 moles of H, and 1.25 moles of N. What is its empirical formula? A) CHN B) C3H6N C) C4H8N D) C5H9N2 8. What is the molar mass of Ca(NO3)2? (AW Ca = 40.1 amu; N = 14.0 amu; O = 16.0 amu) A) 70.1 g/mol B) 62.0 g/mol C) 164.1 g/mol D) 102.1 g/mol 9. Which of the following is an alkali metal? A) Mg B) Fe C) Al D) Na 10. A compound contains 40.0% C, 6.71% H, and 53.29% O by mass. The molecular weight of the compound is 60.05 amu. The molecular formula of this compound is A) C2H4O2 B) CH2O C) C2H3O4 D) C2H2O4 11. How many molecules of water, H2O, are there in 28.0 grams of water? A) 9.37 x 1023 B) 1.56 C) 578 D) 1.56 x 1025 12. When a hydrocarbon burns in air, what component of air reacts? A) nitrogen B) oxygen C) carbon dioxide D) water 13. When the following equation is balanced, the coefficient of Fe3O4 is__________. Al + Fe3O4 à Al2O3 + Fe A) 1 B) 2 C) 3 D) 4

mass spec quiz 4

Déséquilibre des masses monétaires

7 - Mass Society and Democracy

1 - Atoms, ionisation, mass spectroscopy

Part I. (45 points). In the spaces next to the chemical symbol write the name of the element, the condensed electron configuration, and indicate if the element is a metal, nonmetal or metalloid. Name Condensed electron configuration Metal/nonmetal/metalloid A) Cl _________ _______________________ _________________________ B) B _________ _______________________ _________________________ C) K _________ _______________________ _________________________ D) Zn _________ _______________________ _________________________ E) P _________ _______________________ _________________________ Part II. Multiple choice (3 points each = 180 points total). Please circle your answer. There is only one correct answer to each question. 1. The mass % of C in methane (CH4) is __________. A) 25.13 B) 133.6 C) 74.87 D) 92.26 2. Which of the following does not occur as diatomic molecules in its elemental form? A) helium B) nitrogen C) oxygen D) hydrogen 3. The molecular weight of ethanol (C2H5OH) is ____________ amu. A) 34 B) 41 C) 30 D) 46 4. A cube of salt measures 0.550 cm on each side. What is its volume in mm3? A) 166 mm3 B) 5.50 mm3 C) 0.166 mm3 D) 550 mm3

BIOSCI 109: Lecture 22 - Mass Extinction

[Pdf/ePub] Radiant Black Year One Deluxe Hardcover: A Massive-Verse Book by Kyle Higgins, Marcelo Costa download ebook

Touch + Massage

Mass Spectrometry Flashcards

814 final: massage

Therapeutic massage and Manual Lymph Drainage (MLD)

molar mass

Briefly describe the important experimental steps in DNA fingerprinting. Following a major disaster, the bones of four adults and 6 children are discovered in a mass grave. Describe how you could use DNA fingerprinting to determine if any of the individuals belong to a family group, which are males, and which of the adults are the parents. You also have biological samples from a possible maternal grandmother and paternal grandfather. What tests could prove these relationships