Exam 2

grams/moles/atoms

100

one mole of KCl contains how many moles of K?

Of Cl?

K: 1

Cl: 1

200

If you have one mole, how many moles of each element do you have in the compound Mg(NO3)2

Mg:1

N:2

O:6

300

If you have 8.3 g of each of the following elements, Neon, Mercury, Sulfur, and Magnesium, rank them in increasing moles.

Hg<S<Mg<Ne

400

How many atoms in one mole of Ag?

6.02 x 10²³

500

If you have 18.3 g of carbon monoxide, how many grams of carbon do you have?

7.85 g of Carbon

electron configuration

100

What is the e- config for neon?

1s²2s²2p⁶

200

What is the abbreviated e- config for Cl?

[Ne] 3s²3p⁵

300

How many orbitals do d-sublevels contain?

5 

400

the e- config for Li⁺

1s²

500

the e- config for P^3-

1s²2s²2p⁶3s²3p⁶

trends

100

How many valence electrons does neon have?

8 (noble gas)

200

What is the trend for ionization energy?

Increases going bottom to top AND going from left to right.

300

Which group has the highest ionization energy?

8A (noble gases)

400

What is the trend for atomic radius?

Increases going from top to bottom AND going from right to left. 

500

Which element has the largest atomic radius?

Francium 

naming

100

When are roman numerals used?

When a transitional metal is involved 

200

What does the prefix penta mean?

You have 5 of element X

300

how do you name an ionic compound?

metal then nonmetal

400

What is the name of the element: ²⁸X₁₄

Silicon 

Top= atomic mass

bottom= atomic number 

500

What is the name of this compound? 

Al₂(CO₃)₃

Aluminum carbonate 

formulas

100

What are the steps for determining the empirical formula

1. Convert mass percent to grams

2. Convert to moles

3. Divide by the smallest number of moles 

4. (case by case) Multiply values by integer to obtain whole numbers

200

What is the difference between how to determine the empirical and molecular formula?

Empirical is the lowest formula possible, while molecular is not. The same steps are followed for determining empirical and molecular, but molecular has an extra step where you divide the mass of the molecular formula by the empirical formula to determine the number you must multiply the empirical by.

300

What is the chemical formula for calcium phosphide?

Ca₂P₃

400

If the empirical formula is C₃O₈H₂ and the molecular mass is 664.184 g/mol. What is the molecular formula?

C₁₂O₃₂H₈

500

If you have 48.4% of Carbon, 21.4% Oxygen, and 47.0% Nitrogen, what is the empirical formula?

C₆O₂N₅