Chem 1020 Final EXAM 2024/25 UPDATE ALREADY PASSED !! WITH 100% VERIFIED ANSWERS
0 view 0 purchase
Course
Chem 1020
Institution
Chem 1020
Which of the following statements is true?
a: Elements, but not compounds, are pure substances
b: Compounds, but not elements: are pure substances
c: Both elements & compounds are pure substances - CORRECT ANSWER b: Compounds, but not elements: are pure substances
A pure substance F is found...
Chem 1020 Final EXAM 2024/25 UPDATE ALREADY
PASSED !! WITH 100% VERIFIED ANSWERS
Which of the following statements is true?
a: Elements, but not compounds, are pure substances
b: Compounds, but not elements: are pure substances
c: Both elements & compounds are pure substances - CORRECT ANSWER ✔ b:
Compounds, but not elements: are pure substances
A pure substance F is found to change upon heating into two new pure
substances M & Y. Both M & Y may be decomposed by chemical means. We can
conclude that:
a: F is an element, M & Y are compounds
b: F is a compound, M & Y are elements
c: All are elements
d: All are compounds - CORRECT ANSWER ✔ d: All are compounds
Isotopes of a given element:
a: Same mass # but different # of protons
b: Different mass # but identical # of protons
c: Same atomic # but different chemical properties
d: Same mass # but different chemical properties - CORRECT ANSWER ✔ b:
Different mass # but identical # of protons
The quantity "A+Z" gives the number of:
a: Electrons in an atom
b: Neutrons in an atomic nucleus
c: Nucleons in an atomic nucleus
d: All subatomic particles in an atom - CORRECT ANSWER ✔ d: All subatomic
particles in an atom
Write the complete electron configuration of Oxygen - CORRECT ANSWER ✔ 1s2
2s2 2p4
Write the valence electron configuration of Sulfur - CORRECT ANSWER ✔ 3s2
3p4
Write the orbital diagram for Nitrogen - CORRECT ANSWER ✔ /\\/ /\\/ /\/\/\
1s 2s 2p
Group IA is called, how many valence electrons? - CORRECT ANSWER ✔ Alkali
Metals, 1
Group IIA is called, how many valence electrons? - CORRECT ANSWER ✔ Alkali
Earths, 2
, Chem 1020 Final EXAM 2024/25 UPDATE ALREADY
PASSED !! WITH 100% VERIFIED ANSWERS
Group VIIA is called, how many valence electrons? - CORRECT ANSWER ✔
Halogens, 7
Group VIIIA is called, how many valence electrons? - CORRECT ANSWER ✔ Noble
Gases, 8
Convert 80.0km into cm - CORRECT ANSWER ✔ 80.0km x 100000cm/1km = 8.0 x
10^7
Convert 80.0m into km - CORRECT ANSWER ✔ 80.0cm x 1km/1000m = 8.0 x 10^-
2
Convert 2.0 hours into seconds - CORRECT ANSWER ✔ 2.0hrs x 3600secs/1hr =
7200 seconds
Convert 20000 seconds into hours - CORRECT ANSWER ✔ 20000 x 1hr/3600secs
= 5.56 hours
Convert 2.5 m/s into km/hr - CORRECT ANSWER ✔ 2.5m/s x 1km/1000m x
3600/1hr = 9km/hr
What volume (in cm3) of gold is needed to have a mass of 22.8g? The density of
gold is 10.5 g/cm3. - CORRECT ANSWER ✔ 22.8g / 10.5g/cm = 2.17g/cm
What is the density of a liquid if a 10.0g sample has a volume of 10.9mL. Identify
the substance (using the table of densities). - CORRECT ANSWER ✔ 10.0g/10.9mL
= 0.917 (Olive Oil)
There is a temperature of 25 degrees Celsius.
What would it be in Fahrenheit? - CORRECT ANSWER ✔ (25 x 9/5) + 32 = 77F
There is a temperature of 25 degrees Celsius.
What would it be in Kelvin? - CORRECT ANSWER ✔ 25 + 273 = 298 Kelvin
Which has similar properties? (MORE THAN ONE)
a: 1s2 2s1 & 1s2 2s2
b: 1s2 2s2 2p6 & 1s2 2s2 2p6 3s2 3p6
c: 1s2 2s2 2p3 & 1s2 2s2 2p6 3s2 3p6 4s2 3d3
d: 1s2 2s2 2p6 3s2 3p4 & 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 - CORRECT ANSWER
✔ b: 1s2 2s2 2p6 & 1s2 2s2 2p6 3s2 3p6
d: 1s2 2s2 2p6 3s2 3p4 & 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
How many electrons appear in the Lewis symbol for an element whose electron
configuration is 1s2 2s2 2p6? - CORRECT ANSWER ✔ 6 electrons
How many total electrons are present in an N3- ion? - CORRECT ANSWER ✔ 10
electrons
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller VISA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.49. You're not tied to anything after your purchase.
