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40 Chem 1 final DL

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Last updated over 4 years ago
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Elements, compounds and mixtures
Question 1
1.

Approximately how many elements exist in nature?

Question 2
2.

Which of the following is classified as an element?

Question 3
3.

Which of the following would NOT be classified as a mixture?

Atomic structure and electron configuration
Question 4
4.

What is the mass of a 25Mg atom?

Question 5
5.

Isotopes of the same element have different:

Question 6
6.

What is the electron configuration of potassium?

Question 7
7.

What is the shape of a 3p atomic orbital?

Question 8
8.

How many neutrons are there in a 13C atom?

Question 9
9.

Two atoms with the same number of protons but a different number of neutrons are called:

Question 10
10.

How many protons are there in a 13C atom?

Question 11
11.

As a consequence of the discovery by Rutherford, which model of the atoms is now believed to be true?

Question 12
12.

Which electron configuration is correct for S2-?

Question 13
13.

How many valence electrons are there in a silicon atom?

Question 14
14.

How many electrons are there in a Cl- ion?

Periodic Trends and Periodic Table
Question 15
15.

Which of the following elements has properties the most similiar to calcium?

Question 16
16.

As you move from left to right across the second period of the periodic table:

Question 17
17.

Which of the following element had the smallest atomic radius?

Question 18
18.

Electronegativity:

Question 19
19.

Which of the following element is in the halogen group?

Bonding, naming and chemical equations
Question 20
20.

In the chemical reaction in which carbon, hydrogen, and oxygen absorb heat and combine to form carbon dioxide and water, which of the following is considered to be a reactant?

Question 21
21.

Which of the following is true for all chemical reactions?

Question 22
22.

What is NOT true about ionic bonds?

Question 23
23.

Which substance is most likely ionic?

Question 24
24.

What is the charge on the strontium ion?

Question 25
25.

What is happening to the electrons in a covalent bond between two atoms?

The next section is naming formulas and determining the correct formula for the name. Use the flowcharts and your common ion list to do this.
Question 26
26.

Select the correct name for: SiO2

Question 27
27.

Select the correct name for: NaI

Question 28
28.

Select the correct name for: N2O5

Question 29
29.

Select the correct name for: Ca(NO3)2

Question 30
30.

Choose the formula for: sulfur hexafluoride

Question 31
31.

Choose the formula for: arsenic pentachloride

Question 32
32.

Choose the formula for: iron(II) chloride

Question 33
33.

Choose the formula for: magnesium sulfite

Questions 45 and 46 refer to the following equation:
__ Pb + __PbO2 + __H2SO4 --> __PbSO4 + __ H2O + energy
Question 34
34.

Which of the following coefficient sets matches with a balanced equation?

Question 35
35.

Balance this baby! Which of the following coefficient sets matches with a balance equation?
__Al + __ Pb(NO3)2 --> __Al(NO3)3 + __Pb

The mole, molar mass and conversions
Question 36
36.

What is the molar mass of CO2?

Question 37
37.

The number of seconds in an 8 hr school day can be calculated as:

Question 38
38.

What is the molar mass of CF4?

Question 39
39.

What is the mass of 1 mole of (NH4)2SO4?

Question 40
40.

How many liters are there in 5.3 moles of SO2 gas?

Question 41
41.

What is the mass of 3.50 x 1023 CF4 molecules?

Questions 57 - 59 refer to the following equation:
2CH3OH + 3O2 --> 2CO2 + 4H2O
Question 42
42.

How many moles of O2 are required to react with 5 moles of CH3OH?

Question 43
43.

If 4.3 g of CH3OH reacts, how many grams of CO2 will be formed?

Question 44
44.

If 4.3 g of CH3OH reacts, how many moles of water will be formed?

Question 45
45.

What is avogadro’s number?