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Straighterline Chemistry Final Exam 2024/2025- QUESTIONS AND ANSWERS CA$20.22   Add to cart

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Straighterline Chemistry Final Exam 2024/2025- QUESTIONS AND ANSWERS

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findings that are summarized based on a pattern or trend Law tentative explanation for a set of observations Hypothesis If a liquid contains 60% sugar and 40% water throughout its composition then what is it called? Homogeneous mixture does not have a uniform composition throughou...

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  • August 26, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Straighterline Chemistry
  • Straighterline Chemistry
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Straighterline
Chemistry Final Exam
2024/2025-
QUESTIONS AND
ANSWERS

,findings that are summarized based on a pattern or trend

Law




tentative explanation for a set of observations

Hypothesis




If a liquid contains 60% sugar and 40% water throughout its composition then what is it called?

Homogeneous mixture




does not have a uniform composition throughout

Heterogeneous mixture




represents a physical change?

Water, when heated, forms steam.




How many micrograms are in 65.3 kg?

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)

58 cm3

,Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to

0.0610 in3




What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-12 atom?

Atomic mass unit




How many neutrons are there in an atom of lead whose mass number is 208?

126




Which of these elements is chemically similar to magnesium?

Calcium




C(graphite) and C(diamond) are examples of:

allotropes of carbon.




The 80Br- ion has

35 protons, 45 neutrons, 46 electrons.




The formula for sodium sulfide is

Na2S

, Which one of the following formulas of ionic compounds is the least likely to be correct?

Ca2NO3




What is the name of ClO - ion?

hypochlorite




Which of the following is a molecular formula for a compound with an empirical formula of CH?

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)

1.71 × 105 J




Which is the correct electron configuration for gold?

[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)

6.17 × 1014 s-1




A 6.0-gram champagne cork is shot out of an opened champagne bottle and traveled at a speed of 65
km/hour. Calculate the de Broglie wavelength (in meters) of the cork.

6.1 × 10-33 m

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