Exam (elaborations)
Straighterline Chemistry Final Exam/ 258 Questions and Answers Already Passed 100% Accurate!!
Straighterline Chemistry Final Exam/ 258 Questions and Answers Already Passed 100% Accurate!!
[Show more]
Content preview
Straighterline Chemistry Final Exam/ 258Questions and Answers Already Passed
100% Accurate!!
What is the term used for findings that are summarized based on a pattern
or trend?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction - -a. Law
-Which of the following is a tentative explanation for a set of observations?
Select one:
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction - -b. Hypothesis
-If a liquid contains 60% sugar and 40% water throughout its composition
then what is it called?
Select one:
a. Solute
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent - -c. Homogeneous mixture
-Which of the following does not have a uniform composition throughout?
Select one:
a. Element
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent - -d. Heterogeneous mixture
-Which one of these represents a physical change?
Select one:
a. Water, when heated, forms steam.
b. Bleach turns hair yellow.
c. Sugar, when heated, becomes brown.
d. Milk turns sour.
,e. Apples, when exposed to air, turn brown. - -a. Water, when heated, forms
steam.
-How many micrograms are in 65.3 kg?
Select one:
a. 0.653 μg
b. 6.53 × 107 μg
c. 6.53 × 104 μg
d. 6.53 × 10-8 μg
e. 6.53 × 1010 μg - -e. 6.53 × 1010 μg
-A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width)
and 8.0 millimeters (depth). What is the volume of the smart phone in cubic
centimeters? (1 in = 2.54 cm)
Select one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
d. 3.4 cm3
e. 34 cm3 - -a. 58 cm3
-Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to
Select one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3
d. 0.155 in3
e. 0.0610 in3 - -e. 0.0610 in3
-What terms defines a mass which is exactly equal to 1/12 the mass of one
carbon-12 atom?
Select one:
a. Isotope number
b. Mass number
c. Mass-to-charge ratio
d. Atomic number
e. Atomic mass unit - -e. Atomic mass unit
-How many neutrons are there in an atom of lead whose mass number is
208?
Select one:
a. 82
b. 126
c. 208
,d. 290
e. none of them - -b. 126
-Which of these elements is chemically similar to magnesium?
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium - -b. Calcium
-C(graphite) and C(diamond) are examples of:
Select one:
a. isotopes of carbon.
b. allotropes of carbon.
c. the law of definite proportions.
d. different carbon ions. - -b. allotropes of carbon.
-The 80Br- ion has
Select one:
a. 45 protons, 35 neutrons, 45 electrons.
b. 35 protons, 45 neutrons, 34 electrons.
c. 35 protons, 45 neutrons, 36 electrons.
d. 45 protons, 35 neutrons, 46 electrons.
e. 35 protons, 45 neutrons, 46 electrons. - -e. 35 protons, 45 neutrons, 46
electrons.
-The formula for sodium sulfide is
Select one:
a. NaS
b. K2S
c. NaS2
d. Na2S
e. SeS - -d. Na2S
-Which one of the following formulas of ionic compounds is the least likely to
be correct?
Select one:
a. NH4Cl
b. Ba(OH)2
c. Na2SO4
d. Ca2NO3
e. Cu(CN)2 - -d. Ca2NO3
, -What is the name of ClO - ion?
Select one:
a. hypochlorite
b. chlorate
c. chlorite
d. perchlorate
e. perchlorite - -a. hypochlorite
-Which of the following is a molecular formula for a compound with an
empirical formula of CH?
Select one:
a. C2H6
b. C3H9
c. C4H10
d. C6H6
e. None of the answers is correct. - -d. C6H6
-What is the energy in joules of a mole of photons associated with red light
of wavelength 7.00 × 102 nm? (c = 3.00 × 108 m/s; h = 6.63 × 10-34 J • s;
NA = 6.022 × 1023 /mole)
Select one:
a. 256 kJ
b. 1.71 × 105 J
c. 4.72 × 10-43 J
d. 12.4 kJ
e. 2.12 × 1042 J - -b. 1.71 × 105 J
-Which is the correct electron configuration for gold?
Select one:
a. [Xe]4f145d96s2
b. [Xe]4f145d106s2
c. [Xe]4f135d106s2
d. [Xe]4f145d106s1
e. None of the electron configurations is correct. - -d. [Xe]4f145d106s1
-Use the Rydberg equation to calculate the frequency of a photon absorbed
when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4. (R =
1.096776 × 107 m-1; c = 3.00 × 108 m/s)
Select one:
a. 2.06 × 106 s-1
b. 2.74 × 106 s-1
c. 6.17 × 1014 s-1
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 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 Victorious23. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £11.01. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78252 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now