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1 year ago

True or false: chemical reactions are usually written left to right

Chemistry

2 answers:

nika2105 [10]1 year ago

8 0

Answer:

true. e.g

iron+water+oxygen->hydratedironoxide

Gre4nikov [31]1 year ago

5 0

True:

it is always reaction-> product

H2+O-> H2O

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When the absolute value of the difference in electronegativity of two adjacent atom in a compound is 1, they are most likely bon

Morgarella [4.7K]

Answer:polar covalent bond

Explanation:

Compounds are formed ether by donating, receiving or sharing of electrons making the bonds between them to be ionic, or covalent .

Now according to the rule of type of bond assignment due to electronegativity difference of atoms

---When the electronegativity difference is less than 0.5, the bond formed is nonpolar covalent.

---When the electronegativity difference is between 0.5 and 1.6, the bond is considered polar covalent

---When the electronegativity difference greater than 2.0, then the bond is ionic.

Therefore, When the absolute value of the difference in electronegativity of two adjacent atom in a compound is 1, they are most likely bonded by polar covalent bond eg HCl bond , CCL4 bond

8 0

2 years ago

If a tablet of acetaminophen, C8H9NO2, weighs 324 mg, how many moles are there in the tablet? If a tablet of acetaminophen, C8H9

Gnoma [55]

Answer:

$2.14*10^{-3} mol$

Explanation:

number of moles of C8H9NO2 = $\frac{mass}{molar mass}=\frac{324*10^{-3} g}{151.163g/mol}=2.14*10^{-3}mol$

The trick is to remember to convert milligrams to grams because molar mass is normally presented in grams per mole

7 0

2 years ago

What is the volume of as sample that has a mass of 40.0 g and a density of 4.30 g/mL?

kati45 [8]

Explanation:

density = mass/volume so volume = mass/density = 40/4.30

4 0

2 years ago

Give the electronic configuration of carbon atom.

zimovet [89]

Answer:

1s2 2s2 2p2

Explanation:

it has 6 electrons in two energy levels so the sub levels are 1s, 2s and 2p

4 0

2 years ago

Select correct examples of linear molecules for five electron groups. Select correct examples of linear molecules for five elect

Shalnov [3]

Explanation:

Formula to calculate hybridization is as follows.

Hybridization = $\frac{1}{2}[V+N-C+A]$

where,

V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

So, hybridization of $BeCl_{2}$ is as follows.

Hybridization = $\frac{1}{2}[V + N - C + A]$

= $\frac{1}{2}[2 + 2]$

= 2

Hybridization of $BeCl_{2}$ is sp. Therefore, $BeCl_{2}$ is a linear molecule. There will be only two electron groups through which Be is attached.

Similarly, hybridization of $XeF_{2}$ is calculated as follows.

Hybridization = $\frac{1}{2}[V + N - C + A]$

= $\frac{1}{2}[8 + 2]$

= 5

Therefore, hybridization of $XeF_{2}$ is $sp^{3}d. Therefore, [tex]XeF_{2}$ is also a linear molecule. Though there are three lone pair of electrons present on a xenon atom and it is further attached with fluorine atoms through two electron pairs. Hence, there are in total five electron groups.

Thus, we can conclude that out of the given options $XeF_{2}$ is the correct examples of linear molecules for five electron groups.

7 0

2 years ago