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Exam 2: Atoms, Elements, and Compounds

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Question 41

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Enter an integer number (1, 2, 3, ...) in the blank. Sucrose (table sugar) has the formula C₁₂H₂₂O₁₁. How many oxygen atoms would be in 3 formula units of sucrose? ____________________oxygen atoms.

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33
thirty ...

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Question 42

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The image shown below represents an atomic view of a compound CsI. What is the mass of one formula unit?

A) 259.8 g
B) 259.8 amu
C) 1.00 g
D) 6.022 × 10²³ amu

E) A) and C)
F) C) and D)

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Question 43

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Which column of the periodic table is commonly called the halogens?

An element has the following electron arrangement. shell 1:2 electrons shell 2: 8 electrons shell 3:18 electrons shell 4:18 electrons shell 5:7 electrons The Lewis structure for this element would be:

What is the mass of one molecule of glucose, C₆H₁₂O₆?

Sodium is a highly reactive metal and chlorine is a toxic gas, but when they come together the resulting material, sodium chloride (a white solid) , is essential for life. Which of the following is true when sodium and chlorine are brought into contact with one another?

The atomic weight of phosphorus (P) is 30.91 amu or about 31 amu. This indicates that each P atom consists of 15 protons and 16 neutrons.

The alkali metal found in period 2 is lithium.

Enter the chemical symbol in the blank for the element that has the electron arrangement given below. shell 1: 2 electrons shell 2: 8 electrons shell 3: 5 electrons Symbol for the element: _____________________

When a particular solid sample is examined under a microscope, it is observed that there are regions that are black and regions which are yellow. What type of matter is this sample?

Fill in each blank with the appropriate term from the list given below. protons neutrons electrons valence electrons -¹⁴N and ¹⁵O have the same number of _____________________.

Elements in the same period of the periodic table generally show similar chemical behavior.

Use one the following terms to complete the given statement. salt sugar vegetable oil When ____________________ is added to water a heterogeneous mixture forms.

An elements with an electron arrangement of: shell 1:2 electrons shell 2:8 electrons shell 3:18 electrons shell 4: 18 electrons shell 5:7 electrons would have 1 valence electron.

Use the periodic table to determine about how many helium atoms (He) on the average would be needed to get close to the same mass as an oxygen atom (O) .

Based on the text periodic table and using the correct number of significant figures, enter the appropriate number in the blank. The mass of 5.00 mol of oxygen atoms is _____________g.