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kipiarov [429]
3 years ago
11

How can a periodic table help a chemist write the chemical name of a compound from its chemical formula?

Chemistry
2 answers:
madam [21]3 years ago
7 0
It's B. by identifying the elements. 

Reasons: 
prefixes are only used for covalent compounds. 

You don't include the number of atoms when you write the chemical name of a compound. 

Subscripts are basically numbers that tell how many atoms of each element is in a compound. It does not identify the name of an element. 



creativ13 [48]3 years ago
4 0

Answer:

B) by identifying the elements

Explanation:

EDGE 2020 brainliest please

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3 years ago
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astraxan [27]
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8 0
3 years ago
If you weighed out 0.38 g of calcium and reacted it with an excess of hcl, how many moles of h2(g) would you expect to produce?
Hitman42 [59]
Answer is: 0,0095 mol of hydrogen gas will be produced in reaction.
Chemical reaction: Ca + 2HCl → CaCl₂ + H₂.
m(Ca) = 0,38 g.
n(H₂) = ?
n(Ca) = m(Ca) ÷ M(Ca).
n(Ca) = 0,38 g ÷ 40 g/mol
n(Ca) = 0,0095 mol.
from reaction: n(Ca) : n(H₂) = 1 : 1.
n(H₂) = n(Ca) = 0,0095 mol.
n - amount of substance.
4 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
Scientist name: ______________
nikitadnepr [17]
This is easy… like you can’t take 20 min to search this up in Googl
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2 years ago
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