# Structural Formula Problems

Assistance with questions

Select the correct structural formula for 4-ethyl1-1,5heptadiene

A). ch2=ch-ch2-ch ch=ch-ch3

Ch3

B) ch3=ch-ch2-ch-ch=ch-ch3

C2h5

c) ch2=ch-ch2-ch=ch-ch2-ch3

c2h5

2 structural formula for 1,1,3-triethylcyclohexane

3 structural formula for 3-methylpentane

ch3

4 what is the correct chemical name for ch3ch2ch2c ch3

Ch3

5. How many significant digits are there in 600.0 miles

a.1

b3

c4

d2

6. how many significant digits in 0.00060700cm3

A5

B3

C6

D8

7. calculate (1.1x10^2)(2.2x10^-8)(4.6 x10^-8)

A 3.67 x10^-7

B 3.67x10^21

C 3.67x10^11

D 3.67x10^1

8. Calculate (2.2x10^-5)(2.4x10^-7)

(6.2X10^-12)(1.05x10^-6)

A 8.94x10^-7

B 4.47x10^5

C 8.11x10^-7

D 8.11x10^5

9. (2.45)(4.3)^6(3.9)

a. 1.22x10^1

b, 4.81x10^9

c2.64x10^2

d 6.04x10^4

10. covert 5.36 pm to cm

a. 5.36x10^10cm

b5.36x10^-9cm

c5.36x10^-10cm

d5.36x10^4cm

11. convert 245 m3 to cm3

A 2.45x10^2cm3

B2.45x10^8cm3

C2.45x10^-6cm3

D 2.45x10^6cm3

12 convert 1.47 km/h/to mm/s

a. 5.29x10^9mm/s

b. 4.08x10^2mm/s

c. 5.29x10^-3mm/s

d. 4.08x10^-10mm/s

13 If your heart beats 1.2 beats per second how many times will it beat during 4 hours

A 1.73x10^4 heartbeats

B 4.8 heartbeats

C 1.2x10^4 heartbeats

D1.33x10^-3 heartbeats

https://brainmass.com/chemistry/bonding/structural-formula-problems-288774

## SOLUTION This solution is **FREE** courtesy of BrainMass!

I have attached a file with an explanation. Please leave me some feedback if you need any clarification!

Select the correct structural formula for 4-ethyl1-1,5heptadiene

A). ch2=ch-ch2-ch ch=ch-ch3

Ch3

B) ch3=ch-ch2-ch-ch=ch-ch3

C2h5

c) ch2=ch-ch2-ch=ch-ch2-ch3

c2h5

Heptadiene has seven carbons in its longest chain. All of the formulas match this. There will be double bonds at the 1 and 5 carbon. Only compounds A and B match this. 4-ethyl means there is an ethyl group at the fourth carbon. This is compound B.

2 structural formula for 1,1,3-triethylcyclohexane

The base is cyclohexane, a ring with 6 carbons. There will be ethyl groups (2 carbons) on the 1st, 1st, and 3rd carbons:

3 structural formula for 3-methylpentane

Pentane has 5 carbons. 3-methyl means there is a methyl group (CH3) on the 3rd carbon:

ch3

4 what is the correct chemical name for ch3ch2ch2c ch3

Ch3

The longest chain here is 5 carbons, so this is pentane. There are two methyl groups coming off of the 2nd carbon. This is 2,2-dimethylpentane.

5. How many significant digits are there in 600.0 miles

a.1

b3

c4

d2

Any non-zero number is significant. A 0 after a decimal and sigfig is also significant. Any zeroes between sigfigs are significant. There are 4 significant digits.

6. how many significant digits in 0.00060700cm3

A5

B3

C6

D8

Using the same rules as above, there are 5 sigfigs.

7. calculate (1.1x10^2)(2.2x10^-8)(4.6 x10^-8)

A 3.67 x10^-7

B 3.67x10^21

C 3.67x10^11

D 3.67x10^1

To solve this, multiply the numbers before the 10s. This will give you 11.1. When you multiply exponents with the same base, you add the powers. The power will be -14. The answer is 11.1 * 10-14 or 1.11 * 10-13. This does not match any answers. There may be a problem with the posting here.

8. Calculate (2.2x10^-5)(2.4x10^-7)

(6.2X10^-12)(1.05x10^-6)

A 8.94x10^-7

B 4.47x10^5

C 8.11x10^-7

D 8.11x10^5

I'm assuming you want to divide by the bottom numbers:

Multiply the first numbers and add the powers as the problem above:

To solve this, divide the numbers and subtract the powers. This will give you 0.811 * 106. This is the same as 8.11 * 105.

9. (2.45)(4.3)^6(3.9)

a. 1.22x10^1

b, 4.81x10^9

c2.64x10^2

d 6.04x10^4

First multiply 6 and 3.9 to get 23.4.

Raising 4.3 to the 23.4th power gives you 6.66 * 1014. Multiplying this by 2.45 gives 1.63 * 1015. This is not an answer so I think there might be something wrong with your posting.

10. covert 5.36 pm to cm

a. 5.36x10^10cm

b5.36x10^-9cm

c5.36x10^-10cm

d5.36x10^4cm

First convert pm to m:

Now convert m to cm:

11. convert 245 m3 to cm3

A 2.45x10^2cm3

B2.45x10^8cm3

C2.45x10^-6cm3

D 2.45x10^6cm3

You need to convert m to cm, but the numbers are cubic, so you need to cube the conversion:

12 convert 1.47 km/h/to mm/s

a. 5.29x10^9mm/s

b. 4.08x10^2mm/s

c. 5.29x10^-3mm/s

d. 4.08x10^-10mm/s

First convert km to m and then to mm:

Now convert hours to seconds:

13 If your heart beats 1.2 beats per second how many times will it beat during 4 hours

A 1.73x10^4 heartbeats

B 4.8 heartbeats

C 1.2x10^4 heartbeats

D1.33x10^-3 heartbeats

You can use the factor-label method to solve this:

Now multiply by 4 hours to get 17280 beat.

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