RHS-GA-GSE Chemistry CR
Which statement describes an extensive property of matter? - It changes with the color of a substance. - It changes when a new substance is formed. - It changes with the amount of sample that is present. - It changes with the composition of a substance.
- It changes with the amount of sample that is present.
What should the IUPAC name for a binary covalent compound lack? - prefixes - Roman numerals - an -ide ending - the name of a nonmetal
- Roman numerals
Consider the temperature versus time graph below.At what temperature is the substance a heated gas? - at 100°C - below 0°C - above 100°C - between 0°C and 100°C
- above 100°C
When a strip of magnesium metal is touched to a flame, a bright light and a whitish substance are produced. Why is the burning of magnesium considered a chemical change? - because the metal reaches a high temperature - because the metal begins to melt - because a new substance is formed - because the metal is malleable
- because a new substance is formed
In the diagram below, particles of the substance are moving from the liquid phase to the gas phase at the same rate as they move from the gas phase to the liquid phase. The gas and liquid are at... - equilibrium. - a high vapor pressure. - a low vapor pressure. - zero vapor pressure.
- equilibrium
Which of these is an example of a physical change? - sugar, when heated, producing carbon dioxide and water - solid ice, when heated, turning into liquid water - sodium, when exposed to chlorine, forming sodium chloride - aluminum, when heated in air, forming aluminum oxide
- solid ice, when heated, turning into liquid water
The IUPAC name for NF3 should have which of the following? - the prefix "tri" before nitrogen - the Roman numeral (III) after nitrogen - the Roman numeral (III) after fluoride - the prefix "tri" before fluoride
- the prefix "tri" before fluoride
Which is the IUPAC name of O3? - dioxide - oxygen - trioxygen - monoxide
- trioxygen
Which statement describes a chemical property of water? - It reacts with sodium metal. - It has a melting point of 0°C. - It has a density of about 1 g/mL. - It is clear and colorless.
It reacts with sodium metal.
The diagram below shows the different phase transitions that occur in matter. Which best describes the process that arrow 1 represents? - Molecules are speeding up during boiling. - Molecules are depositing as ice on a surface. - Molecules are slowing down during condensing. - Molecules are moving from stationary positions.
Molecules are speeding up during boiling.
Which is a general representation of a secondary amine?
Option C n with 2 dots on top r1 to the left h down the middle h to the right
A gaseous substance turns directly into a solid. Which term describes this change? deposition evaporation melting sublimation
depostion