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HACTEHA [7]
3 years ago
12

The following is NOT an example of a behavior:

Chemistry
1 answer:
GuDViN [60]3 years ago
5 0

Answer:

making the decision to buy a lottery ticket

Explanation:

all the others are q result of a thought........whereas the last one is actually one of the thoughts

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Are Molar Mass and Molecular Mass the same thing? If they are different, then why are they used interchangeably?
exis [7]

At this point there are two answers:  one says that there is no difference, except for the units;  the molecular weight (MW) is the mass of one molecule, while a molar mass is the mass of a mole (6.02 x 10 ^ 23) of molecules.

While in certain contexts both statements can be shown to be true, I'm not sure these answers really provide you with the insight you're looking for.

So, we'll look at your question from a different perspective.   Take a real example, something simple like water.  Water has a nominal MW of 18 (so we'll use nominal precision for simplicity, instead of the 4-places often used for these types of calculations).

The MW of water (formula = H2O) is the weight of one atom of oxygen, which = 16 amu [8-neutrons at 1 amu each plus 8 protons at 1 amu each = 16 amu), plus two atoms of hydrogen, at 1 proton (1 amu) each.  Normal everyday hydrogen has no neutrons.  So for H2O, we have a total molecular weight of 18 amu.

From the CRC reference book we find that one amu weighs 1.66 x 10 ^--24 grams.  Multiplying the two and in keeping with the two units of precision we're working with, one molecule of water has a mass of  29.8 x 10^-24g, or [3.0 x 10 ^ -23 g] per molecule of water.

A Mole is simply Avagadro's number (6.02 x 10 ^ 23) of anything... protons, baseballs, whatever.  The term Molar Mass in chemistry refers to the mass of a mole of molecules.  So in this case a molar mass of water molecules is Avagadro's number of them, the mass therefore being [6.02 x 10 ^ 23] x 3.0 x 10 ^ -23 g/ molecule] =  18.0 g

Summarizing:

Molecular Weight is the weight given in amu of an atom or molecule.  For H2O, the MW is 18 amu or 3.0 x 10 ^ -23 g.

Molar Weight is the weight, usually in grams of 6.02 x 10 ^ 23 measurements which happens to be equal to the MW of the molecule (or atomic wt. of the atom) , and for water is 18.0 g.

So, while MW and molar weight are related, their absolute values are magnitudes apart.

4 0
3 years ago
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The type of heat transfer responsible for distributing most of the heat throughout Earth's atmosphere is
geniusboy [140]

Answer:

A

Explanation:

3 0
3 years ago
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Which correctly lists the types of matter, in terms of their atoms, in order from least tightly packed to most tightly packed? s
alukav5142 [94]

Answer:

gas, liquid, solid

Explanation:

As you go from gas to solid, the atoms get closer together and the kinetic energy decreases.

3 0
3 years ago
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The task in science lab: discover which solid substance, without tasting, is sugar. Donna and Dave have five substances to test,
Alecsey [184]

D. Yes, sugar's melting point is much lower...

5 0
3 years ago
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How do freeze-thaw cycles cause weathering?
natta225 [31]

Answer:

A. When water moves into a crack and freezes, it expands and forces the crack wider.

Explanation:

A crack in a rock can fill with water which then freezes as the temperature drops. As the ice expands, it pushes the crack apart, making the crack larger. When the temperature rises again, the ice melts, and the water fills the newer parts of the crack. Once the water freezes again when the temperature drops, the expansion of the ice causes further expansion to the crack.

8 0
3 years ago
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