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Ostrovityanka [42]
3 years ago
15

Which statement about surfactant molecules is correct?

Chemistry
1 answer:
Hatshy [7]3 years ago
7 0

Answer: c

Explanation: because the heads are hydrophobic and the tails are hydrophilic.estherefore they surfactant molecules containd both a water-insoluble(or oil-soluble)component.

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Fireworks contain metals that are brightly colored when burned. They are less reactive than some other metals. Which metal is on
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The correct answer is C. Mg (Magnesium)
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The specific heat of copper is 0.385 j/g°c which equation would you use
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Which list represents the classification of the elements nitrogen, neon, magnesium, and silicon, respectively?
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The question is incomplete. Complete question is:
Which list represents the classification of the elements nitrogen, neon, magnesium, and silicon, respectively?
(1) metal, metalloid, nonmetal, noble gas
(2) nonmetal, noble gas, metal, metalloid
(3) nonmetal, metalloid, noble gas, metal
(4) noble gas, metal, metalloid, nonmetal
.................................................................................................................

Answer: The correct answer is option 2) nonmetal, noble gas, metal, metalloid

Reason: 
1) Non-metal are bad conductors of electricity. Also non-metal are electronegative in nature. Hence, among the provided elements, nitrogen satisfied the criteria. Hence, it is a non-metal.

2) Noble gas are the elements which have completely filled outermost shell. Hence, among the provided elements, Neon satisfied the criteria.

3) Metal are good conductors of electricity. Also metal are electropositive in nature. Hence, among the provided elements, magnesium satisfied the criteria. Hence, it is a metal.

4) Metalloid have conductivity better than non-metals but poor than conductors. Hence, among the provided elements, Silicon satisfied the criteria. Hence, it is a metalloid.
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3 years ago
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White raven [17]

Answer:

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Potassium is element number 19, so it has 19 protons and 19 electrons in the neutral atom. It has therefore 39-19 = 20 Neutrons.

Explanation:

7 0
2 years ago
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