HW02-solutions - vasquez (mpv244) HW02: Fundamentals...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: vasquez (mpv244) HW02: Fundamentals Revision II shear (52375) 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. These questions test basic knowledge that you need for this course. You are welcome to consult your textbook for information to help do this homework, just be aware of how much help you needed. Some questions *WILL* need you to look things up like atomic masses, fundamental constants and unit conversions. 001 10.0 points The number 2 10 15 is 1. More information is needed. 2. less than one. 3. smaller than 2 . 10- 15 . 4. greater than one. correct Explanation: 2 10 15 = 2 , 000 , 000 , 000 , 000 , 000 1 002 10.0 points You need 100.00 mL of H 2 O and 5.00 mL of liquid plant food to make a solution for your plants. You forgot to bring a measuring cup out to the greenhouse, but you do have a scale and know that the density of H 2 O is 1.00 g/cm 3 , the density of liquid plant food is 1.21 g/cm 3 and 1 cm 3 = 1 mL. How much of the liquid plant food would you use? 1. 6.21 g 2. 0.242 g 3. 6.05 g correct 4. 4.13 g 5. 3.79 g Explanation: (5 mL) 1 cm 3 1 mL 1 . 21 g cm 3 = 6 . 05 g 003 10.0 points Give the nuclide symbol for an atom that has mass number 64 and 35 neutrons. 1. 35 64 Cu 2. 35 64 Gd 3. 64 35 Cu 4. 29 64 Cu 5. 35 29 Br 6. 64 29 Cu correct 7. 29 64 Gd 8. 99 35 Br 9. 99 64 Gd 10. 64 35 Br Explanation: The standard nuclide symbol takes the form A Z E where E is the element symbol, A is the mass number (number of protons plus the number of neutrons) and Z is the atomic num- ber (number of protons). If the mass number is 64 and the number of neutrons equals 35, then 64 35 = 29 is the number of protons or the atomic number. Cu has an atomic number of 29, so 64 29 Cu is the correct symbol. 004 10.0 points A chemical bond is formed when electrons are 1. lost. 2. All of these correct 3. shared. vasquez (mpv244) HW02: Fundamentals Revision II shear (52375) 2 4. gained. Explanation: Bonding can occur in any of these ways. 005 10.0 points In the compound X 2 O the element X could be 1. magnesium. 2. helium. 3. silicon. 4. sodium. correct Explanation: To form a neutral compound X 2 O knowing that O has a charge 2 , each X needs to have an ion charge 1+. Of those listed, sodium is the only element that can have a 1+ charge. 006 10.0 points Zirconium (Zr) is classified as 1. a lanthanide. 2. an actinide. 3. a transition element. correct 4. a noble gas. 5. a representative element. Explanation: Zr is in Group IVB, which is a transition metal group....
View Full Document

Page1 / 7

HW02-solutions - vasquez (mpv244) HW02: Fundamentals...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online