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denis-greek [22]
3 years ago
7

28)

Chemistry
2 answers:
White raven [17]3 years ago
6 0

Answer:

D [polymers]

Explanation:

The joining of monomers (small molecules) is polymerization.

Ksju [112]3 years ago
6 0
The answer is c gluecose
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Solving fractions of
Ilya [14]

1) 1/2 of 24= 12

2) 1/3 of 24= 8

3) 1/4 of 24= 6

hope this helped

7 0
3 years ago
Read 2 more answers
How does William Jennings Bryan respond to the criticism that the free and unlimited coinage of silver will disrupt ""business i
kifflom [539]

Answer:

He responded by saying their business definition was far too narrow.

Explanation:

Williams Bryan relates the battle for free silver with the revolution in the United States.

His iconic "Cross of Gold" address ignited the Democratic National Convention in 1896 where he begged the american people not to be "crucified on the cross of gold." He was said this because of the Republicans plan to introduce a firm gold standard and abolish silver coinage.

3 0
3 years ago
Manganese has a total of 25 electrons, but the following orbital notation for manganese is incorrect. Explain the error in terms
laila [671]
The Orbital configuration for Manganese is as follows:

1s2 2s2 2p6 3s2 3p6 4s2 3d5

It says 3d is shown with five orbitals- this is correct

Then it says the first two orbitals have two electrons-this is incorrect. 

When filling in the orbitals for any element, you first need to distribute to ALL orbitals then extras go from there.

The orbital d can have up to 10 electrons so you need to distribute at least one electron to all ten. Since you only have 5 then only 5 orbitals would have electrons in them. In order for ANY of the orbitals to have two electrons, there would need to be AT LEAST 11 electrons to distribute. 
4 0
3 years ago
In the reaction of aluminum and iron(iii) oxide to form iron and aluminum oxide, δh is - 850 kj. how many grams of aluminum oxid
Semmy [17]
The  grams  of   aluminium  oxide  are  formed when  350  kj  heat  are  released is calculated  as  follows

1mole  =  850Kj
what  about  350kj
=1mole  x350/850  =  0.412  moles

mass  of  Al =   moles  of  Al x  molar  mass of  Al

=  0.412mol  x  27  g/mol  =  11.124  grams
8 0
3 years ago
What is the theoretical yield of methanol (CH3OH) when 12.0 grams of H2 is mixed with 74.5 grams of CO? CO + 2H2 CH3OH
AlladinOne [14]
1) We need to convert 12.0 g of H2 into moles of H2, and <span> 74.5 grams of CO into moles of CO
</span><span>Molar mass of H2:    M(H2) = 2*1.0= 2.0 g/mol
Molar mass of CO:   M(CO) = 12.0 +16.0 = 28.0 g/mol

</span>12.0 g  H2 * 1 mol/2.0 g = 6.0 mol H2
74.5 g CO * 1 mol/28.0 g = 2.66 mol CO

<span>2) Now we can use reaction to find out what substance will react completely, and what will be leftover. 

                                  CO       +         2H2   ------->      CH3OH  
                                 1 mol              2 mol
given                        2.66 mol          6 mol (excess)

How much
we need  CO?           3 mol              6 mol

We see that H2 will be leftover, because for 6 moles H2  we need 3 moles CO, but we have only 2.66 mol  CO.
So, CO will react completely, and we are going to use CO to find  the mass of CH3OH.

3)                              </span>CO       +         2H2   ------->      CH3OH  
                                 1 mol                                        1 mol
                                2.66 mol                                    2.66 mol

4) We have 2.66 mol CH3OH
Molar mass CH3OH : M(CH3OH) = 12.0 +  4*1.0 + 16.0 = 32.0 g/mol

2.66 mol CH3OH * 32.0 g CH3OH/ 1 mol CH3OH =  85.12 g CH3OH
<span>
Answer is </span>D) 85.12 grams.
3 0
3 years ago
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