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Empirical Formula
100
How many grams in 60.2 x 10^23 atoms C?
12.01 g C
100
What is the mass (g) of 1.00 mol Li?
6.94 g Li
100

Which singer's real name is Stefani Joanne Angelina Germanotta?

Lady Gaga

100

Atoms of the same element that have different masses are called: 

What are isotopes

100

What is the empirical formula for C₆H₁₂?

What is CH₂?

200
How many moles in 3.011 x 10 ^23 atoms Mg?
0.5000 mol Mg
200

How many grams in 6.50 moles Cu

413 g Cu

200

What year did the first episode of "Friends" air?

1994

200

In a mass spectrum, what does the tallest peak represent?

The most abundant isotope

200

How do you find the empirical formula from percent composition?

What is convert percentages to grams, find moles, and simplify the ratio?

300
How many grams in 10.5 x 10^23 atoms Mg?
6.05 g Mg
300

How many moles are in 0.535 g Zn?

0.00818 mol Zn

300

What is the name of the fictional African country in "Black Panther"?

Wakanda

300

What would be the average atomic mass of element X if its two isotopes are at 45 grams: 14 % and at 48 grams: 86%

47.58

300

What is the empirical formula of a compound containing 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?

What is CH₂O?

400
How many atoms in 0.250 mol S?
1.51 x 10^23 atoms S
400

How many moles in 2.25 x 10^25 atoms Zn?

37.4 mol Zn

400

What type of pasta’s name translates to “little tongues” in Italian?

Linguini

400

This goes on the y axis of a mass spectrum

What is relative abundance

400

If the molecular formula of a compound is C₈H₁₈, what is its empirical formula?

What is C₄H₉?

500
How many atoms in 0.02550 g Pt?
7.872 x 10^19 atoms Pt
500
How many moles in 150 g S?
4.7 mol S
500

Which fruit is known as the “king of fruits” and has a strong odor?

Durian

500

Element X has two stable isotopes:

  • Isotope A: Mass = 10.012 amu, Relative Abundance = 19.9%
  • Isotope B: Mass = 11.009 amu, Relative Abundance = 80.1%

The average atomic mass is: 

10.81 amu

500

A compound has a molar mass of 90 g/mol and an empirical formula of CH₃. What is its molecular formula?

What is C₆H₁₈ (6 times the empirical formula)?