STRAIGHTERLINE CHEMISTRY FINAL

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STRAIGHTERLINE CHEMISTRY FINAL

EXAM VERSION 1 LATEST 2024 WITH 300

QUESTIONS AND CORRECT VERIFIED

ANSWERS/ STRAIGHT ERLINE CHEMISTRY

FINAL LATEST 2024 (NEW!!)

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

Select one:

• Isotope number
• Mass number
• Mass-to-charge ratio
• Atomic number
• Atomic mass unit

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

Select one:

• 82
• 126
• 208
• 290
• none of them

126 Which of these elements is chemically similar to magnesium?

• Sulfur
• Calcium
• Iron 1 / 4

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• Nickel
• Potassium

Calcium C(graphite) and C(diamond) are examples of...

Select one:

• isotopes of carbon.
• allotropes of carbon.
• the law of definite proportions.
• different carbon ions.

allotropes of carbon.The 80Br- ion has

Select one:

• 45 protons, 35 neutrons, 45 electrons.
• 35 protons, 45 neutrons, 34 electrons.
• 35 protons, 45 neutrons, 36 electrons.
• 35 protons, 45 neutrons, 46 electrons.

35 protons, 45 neutrons, 46 electrons.The formula for sodium sulfide is

Select one:

• NaS
• K2S
• NaS2
• Na2S
• SeS

Na2S Which one of the following formulas of ionic compounds is the least likely to be correct?

Select one:

• NH4Cl 2 / 4

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• Ba(OH)2
• Na2SO4
• Ca2NO3
• Cu(CN)2

Ca2NO3 What is the term used for findings that are summarized based on a pattern or trend?

• Law
• Hypothesis
• Theory
• Phenomena
• Prediction

law Which of the following is a tentative explanation for a set of observations?

• law
• Hypothesis
• Theory
• Phenomena
• Prediction

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

Select one:

• Solute
• Compound
• Homogeneous mixture
• Heterogeneous mixture
• Solvent

Homogeneous mixture Which of the following does not have a uniform composition throughout?

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Select one:

• Element
• Compound
• Homogeneous mixture
• Heterogeneous mixture
• Solvent

Heterogeneous mixture Which one of these represents a physical change?

Select one:

• Water, when heated, forms steam.
• Bleach turns hair yellow.
• Sugar, when heated, becomes brown.
• Milk turns sour.
• Apples, when exposed to air, turn brown.

Water, when heated, forms steam.How many micrograms are in 65.3 kg?

Select one:

• 0.653 μg
• 6.53 × 107 μg
• 6.53 × 104 μg
• 6.53 × 10-8 μg
• 6.53 × 1010 μg

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:

• 58 cm3
• 1.7 x 105 cm3
• 90 cm3
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