Answer:
D. the mass of one mole of a substance
Explanation:
The molar mass of a substance is the mass in grams of one mole of the substance.
- For an element, the molar mass is the relative atoms mass expressed in grams.
- For example 23g of Na, 40g of oxygen
- For compounds, molar mass is the gram -formula or gram - molecular weight.
- This is determined by the addition of its component atomic masses and then expressed in grams.
Answer:
A. volume
Explanation:
Generally the equation for the ideal gas is mathematically given as
PV=nRT
Where
P=pressure
V=volume
R=gas constant
n=Number of Moles
T=Temperature
Therefore
V=nRT/P
Option A
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Answer:
You have read that EM waves can interact with a material medium in
the same ways that mechanical waves do. Three forms of interaction
play an especially important role in how people see light. One form is
reflection. Most things are visible because they reflect light. The two
other forms of interaction are transmission and absorption.
Transmission is the passage of an EM wave
through a medium. If the light reflected from objects did not pass
through the air, windows, or most of the eye, we could not see the
objects. Absorption is the disappearance of an
EM wave into the medium. Absorption affects how things look, because
it limits the light available to be reflected or transmitted.
