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Gnom [1K]
4 years ago
11

Which best describes an element? A pure substance. A type of a mixture. A pure compound. An impure substance.

Chemistry
2 answers:
mr Goodwill [35]4 years ago
7 0

a pure compound because an element is untouched and is just itself

Volgvan4 years ago
4 0

Answer:

A) a pure substance

Explanation:

just took test on edg

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A certain compound was found to have the molecular formula C5H12O2. To which of the following compound classes could the compoun
IgorC [24]

Answer : The given compound belongs to ether and alcohol.

Explanation :

The chemical formula of the given compound is, C_5H_{12}O_2

First we have to calculate the degree of unsaturation.

Formula used:

Degree of unsaturation = \frac{2C+2+N-X-H}{2}

where,

C = number of carbon

H = number of hydrogen

N = number of nitrogen

X = number of halogen

Degree of unsaturation = \frac{2\times 5+2+0-0-12}{2}=0

The degree of unsaturation is, 0 that means there is no double or triple bond in the compound only single bond is present between the atoms.

Thus, the given compound belongs to ether and alcohol.

6 0
3 years ago
Cheryl kept a potted plant near a window. After two days, she observed that the plant had drooped as shown.
Alex_Xolod [135]
A watering the plant. Plants wilt or droop when there’s not enough water because it helps reduce the amount of a surface area
3 0
3 years ago
A compound with the empirical formula CH 2 O has a formula mass of 180 g/mol. What is its molecular formula
olga nikolaevna [1]

Empirical formula mass

  • 12+2(1)+16
  • 28+2
  • 30g/mol

Molecular fornula mass:-180g/mol

  • n=Molecular formula mass/Empirical formula mass
  • m=180/30
  • n=6

Molecular formula:-

  • n×Empirical formula
  • 6(CH_2O
  • C_6H_12 O_6
5 0
2 years ago
What type of bond is is formed when electrons move permanently from one atom to another upon reaction?
VLD [36.1K]
Ionic bonding would be the answer because they transfer electrons. This gives them a charge. If it loses electrons, it becomes an cation, with a positive charge. While if they gain an electron, they get a negative charge, and become a anion. Transferring an electron is losing or gaining, therefore your answer would be that since electrons are permanently being transferred, the answer is IONIC BOND.

Covalent bonds is a wrong answer because they share electrons, which gives them no charge (neutral). 

Also, metallic bonding is not the correct answer. 

So our final answer: A- Ionic bond
7 0
3 years ago
Read 2 more answers
What is the mass percentage of C in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.
mina [271]

Answer:

46.8% should be. correct, I'm not fully sure though. : )

8 0
3 years ago
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