Chemistry Quiz 3, 4, 5, 7 Flashcards
Mass is
Amount of matter in an object
Pressure is the force/area, to increase pressure you
- Decrease the area the force is applied
- Increase the applied force
A boudon gauge utilizeds a coiled tube to measure
The pressure difference between the pressure exerted by a gas in a cylinder and atmospheric pressure
Kinetic energy is diffent than potential energy in that kinetic energy is
energy of motion
The second law of themodynamics states
Thermal contact between two bodies transfers heat from hot to cold
According to Pascal’s principle, if you have a confined fluid at a given pressure, and an exteral pressure is applied
The pressure is transmitted unchanged to every point within the fluid
As the speed of a fluid increases, pressure exerted by the fluid
decreases according to Bernoulli
Viscosity is the property which determines
laminar flow
Calculate the total pressure (Ptotal) if the gauge pressure (Pgauge) on an oxygen cylinder reads 10 psi and atmospheric pressure (Patmosphere) is 14.7 psi
24.7 psi
Which statement is true?
- Kinetic energy is the energy an object has by virtue of being in motion
- A change in internal evergy can be calculated from the heat and work processes.
- Potential energy is stored energy
Atomic Number (Z) equals
Number of protons
T/F: A substance can be both a molecule and an element?
True
The volume of a substance can be described as what?
Extensive physical property
Mass number(75) Atomic number (34) Se- How many neutrons does selenium have?
41
Which element is NOT important for muschle contraction?
Barium
