Amu & Element Isotope – Chemistry Final Exam

The key terms of Chemistry Final Exam include, Element, Isotope, Mass, Abundance, Amu.

I created a new element called Nalbandianium. It has 3 isotopes. The first isotope has a mass of 56.78 amu with an abundance of 43.56% the second isotope has a mass of 58.89 amu with an abundance of 7.89% the third isotope has a mass of 60.55 amu with and abundance of 48.55%. What is the average mass of Nalbandianium?

58.77amu

56.77amu

58.78amu – correct

56.78amu

What charge does group 6A tend to form?

+1

-1

+2

-2 – correct

Classify the element Mg

metalloid

metal– correct

nonmetal

Classify the element Si

metalloid – correct

nonmetal

metal

I created a new element called Nalbandianium. It has 3 isotopes. The first isotope has a mass of 56.78 amu with an abundance of 43.56% the second isotope has a mass of 58.89 amu with an abundance of 7.89% the third isotope has a mass of 60.55 amu with and abundance of 48.55%. What is the average mass of Nalbandianium?

56.77amu

58.78amu – correct

56.78amu

58.77amu

How many bitcoin can someone buy if one bitcoin costs 9345 US Dollars and a person has 6.78×106 Special Dollars?

1 US Dollar = 9.4 Special Dollars

6.82×103BTC

5.99×1011BTC

0.0682BTC

77.2BTC– correct

The special dollars were not a huge hit with a lot of people so the government started a new currency called big dollars. 1 US Dollar = 0.057 Big Dollars.

How many big dollars does it take to buy a 25.00 cent candy? (hint 100 cents = 1 US Dollar)

0.4386Big Dollars

142.5 Big Dollars

0.01425Big Dollars – correct

57.65Big Dollars

I drove and logged a total of 1297km and I filled up my gas tank 3 times, my gas tank can hold 25 liters. What is my mileage/gallon for this trip?

Use the conversion factors:

3.8Liter=1gallon

1.609km=1mile

27.6mi/gal

38mi/gal

282mi/gal

41mi/gal – correct

What is the specific heat capacity of an unknown substance if: The temperature increases from 67C to 98C and 7.2J of energy was absorbed. The mass of this unknown substance is 7.9g.

0.029J/gC – correct

0.094J/gC

0.91J/gC

0.23J/gC

If I put tree branches in a wood chipper and I turn the branch in to wood chips is this an example of a chemical change?

True

False – correct

If I bake some cookies for my significant other for valentines day, when the cookies are nice and golden is this a chemical or physical change?

Chemical – correct

Physical

I found 1.00×1011 pennies in an old abandoned mine. What is my financial value?

A trillionare

A billionare – correct

A dollarare

A thousandare

A millionare

If a car gets 38miles/gallon. What is this value in kilometers/milliliter?

0.01573

0.016– correct

16

15.73

On planet nalbandian there is a unit call nalos. 1 mile = 3.7 nalos. If you run 12.3 miles on earth how many nalos did you run?

46

3.3

3.32

45.5 – correct

On planet nalbandian there is a time unit called nans. 5.6 seconds = 1 nan. If it takes me 98 seconds to brush my teeth on earth how many nans did it take?

18

5488

17.5 – correct

5.6

I created a new element called Nalbandianium. It has 3 isotopes. The first isotope has a mass of 56.78 amu with an abundance of 43.56% the second isotope has a mass of 58.89 amu with an abundance of 7.89% the third isotope has a mass of 60.55 amu with and abundance of 48.55%. What is the average mass of Nalbandianium?

58.77amu

56.77amu

58.78amu – correct

56.78amu

What charge does group 6A tend to form?

+1

-1

+2

-2 – correct

Classify the element Mg

metalloid

nonmetal