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Margaret [11]
3 years ago
11

Can I get some help?

Chemistry
1 answer:
Brut [27]3 years ago
6 0
Yes, of course))))))
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How many grams of co2 is produced when oxygen reacts with carbon?
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44g of CO2 can produce by the reaction of carbon with oxygen
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How are the atomic number and the number of protons related to each other? how do the number of protons, number of neutrons, and
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The atomic number (Z) uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons.

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Why is enthalpy important?
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2 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

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Mobile radio communication
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