A metallic bond is formed between what two types of elements

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Answer 1

Answer:

Answer:

metallic bonds are defined as those in which metals share valence electrons for example when sodium metallically bonds with itself each atom is sharing the electrons in the third orbital with up to eight other atoms the same thing happens with magnetism or other metals metallically bond to themselves.

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On average, about ____________ of incoming solar radiation is reflected back to space.A 50%
B 30%
C 20%
D 10%

Answers

I believe it B 30% hope that helps

I think it’s B I’m not sure sorry if it’s wrong

1,780 mL of a gas is at 37.5°C. At what temperature would the volume of the gasincrease to 2.55 L?

Answers

Answer:

171.8°C

Explanation:

V1= 1780ml, V2= 2.55L= 2550L, T1= 273+37.5= 310.5

T2=?

Applying

V1/T1 = V2/T2

1780/310.5 = 2550/T2

T2= 444.8K -273 = 171.8°C

Compute the repeat unit molecular weight of polystyrene. (b) Compute the number-average molecular weight for a polystyrene for which the degree of polymerization is 23000.

Answers

Answer :

(a) The repeat unit is, styrene

(b) The number-average molecular weight is, 2392000 g/mol

Explanation :

First we have to calculate the repeat unit molecular weight of polystyrene.

As, the repeat unit is, styrene having chemical formula $C_8H_8$

Molecular weight of repeat unit = 8 × C + 8 × H

Molecular weight of repeat unit = 8 × 12 g/mol + 8 × 1 g/mol

Molecular weight of repeat unit = 104 g/mol

Now we have to calculate the number-average molecular weight.

Number-average molecular weight = Average repeat molecular weight × Degree of polymerization

Number-average molecular weight = (104 g/mol) × (23000)

Number-average molecular weight = 2392000 g/mol

Thus, the number-average molecular weight is, 2392000 g/mol

Final answer:

The repeat unit molecular weight of polystyrene is 104.15 g/mol. The average molecular weight of polystyrene with a polymerization degree of 23000 is approximately 2,395,450 g/mol.

Explanation:

To answer this question, we first need to understand that the repeating unit in polystyrene is the styrene monomer, which is C8H8. The molecular weight of this unit can be calculated by adding up the atomic weights of all the atoms in the monomer. The atomic weights of carbon (C), hydrogen (H), and styrene-based on the periodic table are approximately 12.01 amu, 1.01 amu, and 104.15 g/mol respectively. This gives a total of 104.15 g/mol for the repeat unit molecular weight of polystyrene.

Given that the degree of polymerization is 23000, we can calculate the number-average molecular weight by multiplying the repeat unit molecular weight (104.15 g/mol) by the degree of polymerization (23000). This gives a total of approximately 2,395,450 g/mol for the number-average molecular weight.

Learn more about Molecular Weight here:

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Which of the following best describes the crest of a transverse wave?а. length
b. high point
c. speed
d. low point

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Answer:

Explanation:

What pressure is exerted on the bottom of a 0.500-m-wide by 0.900-m-long gas tank that can hold 50.0 kg of gasoline by the weight of the gasoline in it when it is full?