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3 years ago

How valence electrons does oxygen have.

Chemistry

2 answers:

lions [1.4K]3 years ago

8 0

Answer:

six valence electrons.

Explanation:

Valence electrons are the electrons in the outermost shell, or energy level, of an atom.

Kaylis [27]3 years ago

3 0

Answer:

six

Explanation:

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You are on a field trip to a nearby lake for biology class and want to perform a quick analysis of the water’s approximate pH le

vitfil [10]

The easiest way to approximate ph level is through the ph paper measurement system because using pH paper would be best for doing a quick measurement in the field. It does not essentially need to be calibrated or standardized and the papers make available an instant estimate.

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3 years ago

The empirical formula of styrene is CH; its molar mass is 104.1 g/mol. What is the molecular formula of styrene?

BlackZzzverrR [31]

The molecular formula of styrene is B) C8H8.

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7 0

3 years ago

1. convert 8.43 x 1025 atoms of Fe to moles

Luba_88 [7]

Answer:

The number of moles of Fe are, 139.9 moles.

The number of moles of CO are, 7.89 moles.

The number of moles of Al are, $4.04\times 10^{-4}$ moles.

Explanation :

As we know that 1 mole of substance contains $6.022\times 10^{23}$ atoms or molecules.

Part 1:

As, $6.022\times 10^{23}$ atoms of Fe present in 1 mole

So, $8.43\times 10^{25}$ atoms of Fe present in $\frac{8.43\times 10^{25}}{6.022\times 10^{23}}\times 1=139.9$ mole

Thus, the number of moles of Fe are, 139.9 moles.

Part 2:

As, $6.022\times 10^{23}$ molecules of CO present in 1 mole

So, $4.75\times 10^{24}$ molecules of CO present in $\frac{4.75\times 10^{24}}{6.022\times 10^{23}}\times 1=7.89$ mole

Thus, the number of moles of CO are, 7.89 moles.

Part 3:

As, $6.022\times 10^{23}$ atoms of Al present in 1 mole

So, $2.43\times 10^{20}$ atoms of Al present in $\frac{2.43\times 10^{20}}{6.022\times 10^{23}}\times 1=4.04\times 10^{-4}$ mole

Thus, the number of moles of Al are, $4.04\times 10^{-4}$ moles.

4 0

3 years ago

Which of the following statements best explains why atoms bond?

Keith_Richards [23]

Answer:

atoms bond to attain neutral configuration or to get noble gas configuration.

Explanation:

atoms always want to be stable by attaining noble gas configuration.

they do so by forming bonds. they also bond to each other to make their outer electrons stable that is if the atom has an excessive electron than its neutral configuration it can bond to another atom that has one less electron than its neutral configuration by ionic bond.

7 0

3 years ago

PLEASEEEE HELPPP

Dmitry [639]

Answer:

MASS: The amount of matter in an object. Mass is measured in the unit kg (kilograms). Example: Car = High mass. Paperclip = low mass.

VOLUME: The amount of space something takes up. Volume is measured in the unit m^3 (cubic meters). Examples: School = high volume. Paperclip = Low volume.

Hope this helped!

Explanation:

7 0

3 years ago