How many carbon atoms are in the following molecule of isobutane? (ch3)3ch

Chemistry

2 answers:

STALIN [3.7K]2 years ago

4 0

Number of Carbon atoms = 3*1 + 1 = 3 + 1 = 4

In short, Your Answer would be Option B

Hope this helps!

Crazy boy [7]2 years ago

4 0

Answer: B. 4

Explanation:

There are 4 carbon atoms present. Looking at the methyl group CH3, there is presence of carbon C which occurs three times because we have 3-methyl groups (CH3) plus another carbon C attached to the CH compound making it 4-carbon atoms present.

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Arrange these molecules in order of decreasing mass: C6H14 , NO2 , Fe2O3 , and CaCO

babunello [35]

The following is the arrangement of the given molecules in decreasing order of mass: $\text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}$

Solution:

First inorder to arrange the elements in descending order of their mass we have to calculate the molecular mass of each element. The calculation is as follows:

Mass of C6H14:

$C\rightarrow6\times12.01 = 72.06$

$H\rightarrow14\times1.008 = 14.112$

Mass of C6H14 is 86.172

Mass of NO2:

$N\rightarrow1\times14.0067 = 14.0067$

$O\rightarrow2\times15.9994 = 31.9988$

Mass of NO2 is 46.0055

Mass of Fe2O3:

$Fe\rightarrow2\times55.845 = 111.69$

$O\rightarrow3\times15.9994 = 47.9982$

Mass of Fe2O3 is 159.6882

Mass of CaCO:

$Ca\rightarrow1\times40.078 = 40.078$

$C\rightarrow1\times12.01 = 12.01$

$O\rightarrow1\times15.9994 = 15.9994$

Mass of CaCO will be 68.0874

So, the order will be $159.6882>86.172>68.0874>46.0055$ which is $\text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}$

6 0

3 years ago

Write a condensed structural formula for the repeat unit of the Kevlar molecule

shusha [124]

Explanation:

Kevlar is a fiber which is used in making of bullet proof vests and armors. It is a co-polymer which is formed by condensing two organic molecules 1,4-phenylene-diamine and terephthaloyl chloride.

$NH_2C_6H_4NH_2+Cl-(CO)-C_6H_4-(CO)-Cl\xrightarrow[-2HCl]{ }$