What measurement represents volume?
Volume is the measure of the amount of space occupied by an object. The standard SI unit of volume is defined by the base unit of length (Figure 3). The standard volume is a cubic meter (m3), a cube with an edge length of exactly one meter.
Which choice best describes the degree of uncertainty in the measurement 4.0032 g?
Which choice best describes the degree of uncertainty in the measurement 4.0032 g? -The uncertainty cannot be determined without additional information. -The quantity is exact.
What is the valence shell electron configuration of the ion formed from an atom of the halogen family?
The halogens all have the general electron configuration ns 2 np 5 , giving them seven valence electrons. They are one electron short of having the full outer s and p sublevel, which makes them very reactive.
Which characteristics correctly describe neutron?
Unlike protons and electrons, which are electrically charged, neutrons have no charge—they are electrically neutral. That’s why the neutrons in the diagram above are labeled n0. The zero stands for “zero charge”. The mass of a neutron is slightly greater than the mass of a proton, which is 1 atomic mass unit (amu).
Which best describes the size and shape of a sample of gas?
Which best describes the size and shape of a sample of gas? It has definite volume, but shape is determined by the container. Its volume is determined by the container, but it has a definite shape. Volume and shape are both determined by the container.
Which of the following best describes the characteristics of a gas?
Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.
Which intermolecular force is characteristic of compounds with low molar mass?
Answer: Hydrogen bonds. Explanation: The intermolecular forces are the forces that are presented between molecules in a substance.
Which description best fits a liquid?
A liquid has definite volume, shape of the container and moderate intermolecular attractions.
What is the process called when a gas changes directly to a solid?
Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.
What is the direct change from a solid to a gas?
Sublimation is the conversion of a substance from the solid to the gaseous state without its becoming liquid. It occurs more frequently among substances that are close to their freezing point. Sublimation, in physics, conversion of a substance from the solid to the gaseous state without its becoming liquid.
Is liquid low energy?
The molecules move around very little and have a low amount of energy. Molecules in a liquid have more energy than molecules in a solid. And if you heat it up even more, the molecules will speed up so much that they won’t be stuck together at all. The molecules in the gas have the most energy.
What are the 6 changes of matter?
Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization.
Does melting absorb energy?
Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.
How does the size of the ice cube affect its melting time?
Results: The larger the surface area of the ice cube the more heat it absorbs, so the spherical ice cube will melt the slowest if it has the least surface area.