Question 1

What is the correct name for the compound CoCl2·6H2O?

Accepted Answer

Cobalt(II) chloride hexahydrate

Question 2

Which of the following is the correct formula for copper(II) sulfate hexahydrate?

Accepted Answer

$$\mathrm{$$CuSO_4$$ \cdot 6H_2O}$$

Question 3

What is the correct formula for the compound formed between magnesium and oxygen?

Accepted Answer

$$\mathrm{MgO}$$

Question 4

Which of the following is the correct name for $$\mathrm{$$HNO_3$$}$$?

Accepted Answer

Nitric acid

Question 5

What is the correct formula for diphosphorus pentoxide?

Accepted Answer

$$\mathrm{P_2O_5}$$

Question 6

Which of the following is the correct formula for dichlorine heptoxide?

Accepted Answer

$$\mathrm{Cl_2O_7}$$

Question 7

A sample contains 18.0 g of glucose ($$\mathrm{C_6H_{12}O_6$}). $$How many moles of glucose are present?

Accepted Answer

$$\mathrm{0.100\ mol}$$

Question 8

How many moles of $$\mathrm{O_2$}$$ are present in 1.60 moles of sodium phosphate ($$\mathrm{Na_3PO_4}$$)?

Accepted Answer

$$\mathrm{6.40\ mol}$$

Question 9

A compound contains 10.15 g P and 26.55 g O. What is its empirical formula?

Accepted Answer

$$\mathrm{P_2O_5}$$

Question 10

Which of the following is the molecular formula of a compound whose empirical formula is $$\mathrm{CH_2$}$$ and whose molar mass is 56 g/mol?

Accepted Answer

$$\mathrm{C_4H_8}$$

Question 11

What is the formal charge on the sulfur atom in the thiocyanate ion ($$\mathrm{SCN^-}$$)?

Accepted Answer

$$-1$$

Question 12

What is the molecular geometry and number of electron groups for $$\mathrm{$$BrF_5$$}$$?

Accepted Answer

Square pyramidal, 6 electron groups

Question 13

Which of the following compounds contains only covalent bonds?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 14

Which element has the highest electronegativity?

Accepted Answer

F

Question 15

What is the formal charge on the central carbon atom in $$\mathrm{CO_2$}$$?

Accepted Answer

$$0$$

Question 16

What is the approximate bond angle in a molecule with a tetrahedral shape?

Accepted Answer

$$109.5^\circ$$

Question 17

What is the molecular geometry of $$\mathrm{NH_3$}$$?

Accepted Answer

Trigonal pyramidal

Question 18

Which of the following molecules features sp$$^2$$ hybridization and a trigonal planar geometry?

Accepted Answer

$$\mathrm{BF_3$}$$

Question 19

How many sigma bonds are present in the Tylenol molecule shown below?

Accepted Answer

13

Question 20

Which of the following best describes the electron configuration of valence electrons in a nitrogen molecule ($$\mathrm{N_2$}) $$using molecular orbitals?

Accepted Answer

$$\sigma_{2s}^2\ \sigma_{2s}^{*2}\ \pi_{2p_x}^2\ \pi_{2p_y}^2\ \sigma_{2p_z}^2$$

General Chemistry I: Practice Problems and Key Concepts for Exam 2

Guida di studio - Domande di pratica

Study guide - Flashcard