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iren [92.7K]
3 years ago
9

Help with my science

Chemistry
1 answer:
erica [24]3 years ago
5 0

Answer:

<h2>C) GNEISS </h2>

Explanation:

I hope this helps

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What is easier to observe about an object,it’s physical properties or it’s chemical properties. Explain why.
Sladkaya [172]

Answer:

Physical Properties

Explanation:

You are able to see physical properties but are unable to see chemical properties.

7 0
3 years ago
26 POINTS!
lawyer [7]

Answer:I think it’s A.Positive. Not sure though.

Explanation:

7 0
3 years ago
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Why are fixed resistors’ values indicated by color bands rather than printing the numeric value on their exterior?
gladu [14]
Because there are so many different values of numbers, it would be impractical to use 1Ω, 2Ω, 3Ω... etc... Using colored bands helps make reading it a little easier to the trained eye. There are hundreds of thousands, if not tens of millions of different resistors would need to exist to cover every value. So you just use something called "preferred values" with their resistance values posted on them instead.
6 0
3 years ago
A) Compute the repeat unit molecular weight of polystyrene. B) Compute the number-average molecular weight for a polystyrene for
Andrej [43]

Answer:

Explanation:

In Polystrene, the molecular formula for the repeat unit = C_8H_8;

and the atomic weights of Carbon C = 12.01 g/mol

For Hydrogen, it is 1.01 g/mol

Hence, the repeat unit molecular weight is:

m = 8 (12.01 g/mol)+8(1.01 g/mol)

m = 96.08 g/mol + 8.08 g/mol

m = 104.16 g/mol

The degree of polymerization = no-average molecular weight/repeat unit molecular weight.

Mathematically;

DP = \dfrac{\overline M_n}{m}

\overline M_n= DP \times m

\overline M_n= 25000 \times 104.16 \ g/mol

\overline M_n= 2604000  \ g/mol

7 0
2 years ago
What is the name of this formula?
Alex_Xolod [135]

Answer:

Iron(III) Oxide

Explanation:

You can tell that this formula is for the molecule Iron(III) oxide because it has two iron atoms and three oxygen atoms.

Fun Fact: There are three main types of iron oxides, with this being one of them.

Hope this helped! :^)

3 0
2 years ago
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