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3 years ago

Determine the chemical formulas for the two compounds below. (Carbon, Hydrogen, and Oxygen).

Chemistry

1 answer:

tester [92]3 years ago

4 0

Remember that any intersection of lines is a C, and that the number of hydrogens attached are the necessary to complet the 4 bonds.

1) CH3 - CH (OH) - CH (CH3) -CH3

2) CH3 - O - CH(CH3)-CH2 - CH3

I have used the parenthesis to indicate that the radical inside is in other branch, bonded by a single line -

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Question 18 (5 points)

NeX [460]

Answer:

d. oxygen is a pure substance and rocks are mixtures

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3 years ago

Which segement of the heating curve shown above represents an increase in the potential energy, but no change in the kinetic ene

Lisa [10]

RS because it is moving but not a lot

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4 years ago

Read 2 more answers

Identify the element symbol<br> 1s22s22p63s23p64s23d104p65s24d5

madam [21]

Answer:

Explanation:

You just have to follow the rows with the exponents. Just remember that when we get to d, the number in the front is a period lower. Hope this helps!

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1 year ago

monatomic ion with a charge of +2 has an electronic configuration of 1s22s22p63s23p6. This ion is a(n) . What is the chemical sy

Debora [2.8K]

Answer: The ion is $Ca^{2+}$ . The chemical symbol of the noble gas this ion is isoelectronic with Kr.

Explanation:

The given electronic configuration is,

$M^{2+}:1s^22s^22p^63s^23p^6$

The number of electrons = 2 + 2 + 6 + 2 + 6 = 18 electrons

As the ion has a charge of +2 , that means it has lost two electrons so the the neutral element will have 2 more electrons i.e 18+2 = 20. The element has atomic number of 20 and the element will be Calcium with electronic configuration of

$M: 1s^22s^22p^63s^23p^64s^2$

Thus the symbol of ion is $Ca^{2+}$ . the nearest noble gas with 18 electrons is Krypton with symbol Kr.

3 0

4 years ago

Which of the following is unchanged at the end of the CNO cycle?

Musya8 [376]

Answer:

The correct option is: A. carbon-12

Explanation:

The CNO cycle, the abbreviation for the carbon-nitrogen-oxygen cycle, is a catalytic cycle by which the stars produce helium from elemental hydrogen, via a series of nuclear fusion reactions.

This cycle involves the fusion of four protons with carbon ( $_{6}^{12}\textrm{C}$ ), nitrogen isotope ( $_{7}^{13}\textrm{N}$ ), and oxygen isotope ( $_{8}^{15}\textrm{O}$ ), to give an alpha particle and two electron neutrinos and positrons.

The reaction involves the regeneration of carbon ( $_{6}^{12}\textrm{C}$ ) nucleus in the last step.

$_{6}^{12}\textrm{C}$ → $_{7}^{13}\textrm{N}$ → $_{6}^{13}\textrm{C}$ → $_{7}^{14}\textrm{N}$ → $_{8}^{15}\textrm{O}$ → $_{7}^{15}\textrm{N}$ → $_{6}^{12}\textrm{C}$

3 0

3 years ago