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Questions and Answers
What is the term for a mixture that has a uniform composition?
What is the term for a mixture that has a uniform composition?
- Pure substance
- Compound
- Heterogeneous mixture
- Homogeneous mixture (correct)
What is the correct symbol for the element iron?
What is the correct symbol for the element iron?
- Tn
- N
- S
- Fe (correct)
Which of the following states of matter is NOT significantly compressible?
Which of the following states of matter is NOT significantly compressible?
- Liquids
- Gases
- Solids (correct)
- Plasma
A sample of osmium has a mass of 21.8 g and a density of 22.6 g/cm3. What is its volume?
A sample of osmium has a mass of 21.8 g and a density of 22.6 g/cm3. What is its volume?
What is the temperature in Celsius for a temperature of 302 K?
What is the temperature in Celsius for a temperature of 302 K?
What is the term for how close a measured number is to the true value?
What is the term for how close a measured number is to the true value?
What is the term for the number of digits in a measured value that are known to be reliable?
What is the term for the number of digits in a measured value that are known to be reliable?
What is the correct formula to convert temperature from Celsius to Kelvin?
What is the correct formula to convert temperature from Celsius to Kelvin?
What is the mass of a block of osmium that measures 1.01 cm × 0.233 cm × 0.648 cm, given its density is 22.6 g/cm³?
What is the mass of a block of osmium that measures 1.01 cm × 0.233 cm × 0.648 cm, given its density is 22.6 g/cm³?
How many significant figures are in the number 0.00430?
How many significant figures are in the number 0.00430?
What is the result of the multiplication 6.3 × 3.25, reported to the proper number of significant figures?
What is the result of the multiplication 6.3 × 3.25, reported to the proper number of significant figures?
An object accelerates from rest to a speed of 700 m/s in 2.75 min. What is its rate of acceleration in m/s²?
An object accelerates from rest to a speed of 700 m/s in 2.75 min. What is its rate of acceleration in m/s²?
What is the correct result of the addition 12 + 1.2 + 0.12 + 0.012, reported to the proper number of significant figures?
What is the correct result of the addition 12 + 1.2 + 0.12 + 0.012, reported to the proper number of significant figures?
What is the physical state of matter that has a specific volume but no specific shape?
What is the physical state of matter that has a specific volume but no specific shape?
What is the symbol for the element lead?
What is the symbol for the element lead?
What is an example of a solution?
What is an example of a solution?
What is the chemical symbol for elemental potassium?
What is the chemical symbol for elemental potassium?
What is the SI unit of velocity?
What is the SI unit of velocity?
What is the unit of force in the SI system?
What is the unit of force in the SI system?
What is the temperature of 25°C in Kelvin?
What is the temperature of 25°C in Kelvin?
What is the density of a sphere if it sinks in liquid mercury?
What is the density of a sphere if it sinks in liquid mercury?
What is the mass of a piece of silver with a volume of 23.6 cm^3 and density 10.5 of Mg/m3 ?
What is the mass of a piece of silver with a volume of 23.6 cm^3 and density 10.5 of Mg/m3 ?
What is the mass of 30.5 mL of a liquid with a density of 2.67 g/cm^3?
What is the mass of 30.5 mL of a liquid with a density of 2.67 g/cm^3?
What is the unit of momentum in the SI system?
What is the unit of momentum in the SI system?
Study Notes
Mixture Types
- A homogeneous mixture has uniform composition and properties throughout
- A heterogeneous mixture has non-uniform composition and properties throughout
- A compound has atoms of different elements chemically bonded together
- A pure substance has a fixed composition and properties
- Solid, liquid, and gas are states of matter
Element Symbols
- The symbol for sodium is Na
- The symbol for tin is Sn
- The symbol for iron is Fe
- The symbol for neon is N
- The symbol for bromine is Br
- The symbol for potassium is K
- The symbol for lead is Pb
Physical Properties
- Density is an intensive property that does not depend on the amount of substance
- Temperature is an intensive property that does not depend on the amount of substance
- Mass is an extensive property that depends on the amount of substance
- Boiling point and freezing point are intensive properties that do not depend on the amount of substance
- Accuracy refers to how close a measured number is to the true value
- Precision refers to how close a measured number is to other measured numbers
Temperature Conversions
- T(K) = t(°C) + 273.15
- 1 °C = 1.8 °F + 32
- 1 K = -272.15 °C
Density Calculations
- Density = mass / volume
- Volume of a cube = side length × side length × side length
- Mass of a cube = density × volume
Unit Conversions
- 1 nanometer = 1000 picometers
- 1 kilogram = 1,000,000 milligrams
- 1 meter per second = 3.6 kilometers per hour
Other Concepts
- Absolute zero is 0 K or -273.15 °C
- Momentum is defined as the product of mass and velocity
- The SI unit for force is the Newton, which is kg·m/s²
- The SI unit for velocity is m/s
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Description
Test your knowledge of fundamental chemistry concepts, including mixtures, elements, and states of matter. Questions cover basic definitions, properties, and classifications.
