Answer:
A.It is the same for every sample of a single substance.
Explanation:
That is a graph read both sides and you see speed and distance which must mean that someone is graphing peoples speed.
Answer:
A river and its tributaries make up a watershed (aka river system or drainage basin)
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Answer:

Explanation:
The<em> mole fraction</em> of a component in a mixture is the number of moles of the component divided by the total number of moles of all the components, multiplied by 100.
The symbol X is used to represent the mole fraction.

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<u>1. Convert masses in grams to number of moles</u>
Formula:
- number of moles = mass in grams / molar mass
a) Lithium bromide
- Chemical Formula: LiBr
- Molar mass: 86.845 g/mol

b) Water

c) Total number of moles = 2.00 mol + 20.0 mol = 22.0 mol
<u>2. Mole fraction of lithium bromide</u>
