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suter [353]
3 years ago
9

Help me please i put nine points!

Chemistry
1 answer:
Ahat [919]3 years ago
3 0

Answer:

eons.

It would be D. An eon.

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Which of the following sets are isoelectronic (i.e., have the same number of electrons)? i. Br-, Kr, Sr2+ ii. C, N-, O2- iii. Mg
il63 [147K]

Answer:

ii. C,\ N^-,\ O^{2-}

Explanation:

Isoelectric species are the species which have same number of electrons.

From the given options:-

C,\ N^-,\ O^{2-} are the isoelectric species.

All the three species have same number of electrons which is equal to 6.

Carbon has 6 electrons.

N^- has 6 electrons.

O^{2-} has 6 electrons.

8 0
3 years ago
Which statement best characterizes chemical reactions
amid [387]
Dangerous 
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3 years ago
What dissolved solid has the highest concentration in the ocean? sodium chloride
jeyben [28]

Answer:

chloride and sodium.

Explanation:

These two make up over 90% of all dissolved ions in seawater.

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3 0
3 years ago
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If 36.2g of Acetic Acid (HC2H302) was dissolved in 300. mL of water, what is the
uysha [10]

Answer:

2.01 M

Explanation:

Step 1: Calculate the moles of acetic acid (HC₂H₃O₂)

The molar mass of acetic acid is 60.05 g/mol. We will use this data to calculate the moles corresponding to 36.2 g of acetic acid.

36.2g \times \frac{1mol}{60.05g} = 0.603mol

Step 2: Convert the volume of solution to liters

We will use the relation 1000 mL = 1 L. We assume that the volume of solution is that of water (300 mL)

300mL \times \frac{1L}{1000mL} = 0.300L

Step 3: Calculate the molarity of the solution

The molarity is equal to the moles of solute (acetic acid) divided by the liters of solution

M = \frac{0.603mol}{0.300L} = 2.01 M

7 0
3 years ago
What is abbreviated structural formula of the 2-metil-5-isopropiloctan?​
Alja [10]

Answer:

            CH3

            |

CH3-    C H  -CH2-CH2-      CH   - CH2-CH2-CH3

                                              |

                                              CH

                                           /     \

                                         CH3  CH3

Explanation:

Octan

C-C-C-C-C-C-C-C

Metyl

CH3 -

Isopropyl

     CH3

    /

- CH

   \

     CH3

2-metil-5-isopropiloctan

           CH3

            |

CH3-    C H  -CH2-CH2-      CH   - CH2-CH2-CH3

                                              |

                                              CH

                                           /     \

                                         CH3  CH3

                           

8 0
3 years ago
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