Question 1

How many electrons are required to completely fill the $$2p$$ subshell?

Accepted Answer

6

Question 2

Which of the following elements is classified as a noble gas?

Accepted Answer

He

Question 3

A 1.0 g sample of which substance will exhibit the smallest temperature change when exposed to 1.0 J of heat energy? (Specific heat capacities: Glass $$= 0.840 J/g$$·°C, Water $$= 4.18 J/g$$·°C, Methanol $$= 2.14 J/g$$·°C, Graphite $$= 0.710 J/g$$·°C, Titanium $$= 0.523 J/g$$·°C)

Accepted Answer

Water

Question 4

Which of the following pairs of numbers have the larger number written first?
I. $$7.2 	imes 10^3$ and 8.2$$ 	imes $$10^2
II$$. $$0.00052$$ and $$6.8 	imes 10$$^{-3}$$
III. 1250$ and 3.4$$ 	imes $$10^2$$

Accepted Answer

I and III

Question 5

How many unpaired electrons does a carbon atom have in its ground state electron configuration?

Accepted Answer

2

Question 6

Which of the following options has the same number of neutrons as $$^{80}\mathrm{Br}$$?

Accepted Answer

Only II

Question 7

Which of the following statements about the characteristics of matter is FALSE?

Accepted Answer

The chemical composition of metallic iron does not change during rusting.

Question 8

Refer to the diagram with three boxes labeled I, II, and III. Which of the diagrams represent a pure substance?

Accepted Answer

I only

Question 9

The first electron of an oxygen atom resides in what type of orbital?

Accepted Answer

s

Question 10

What neutral element is described by the electron configuration $$1s^22s^22$p^63s^1$?

Accepted Answer

Na

Question 11

Which of the following electron configurations cannot exist for atoms in their ground state?

Accepted Answer

$$[Ne]2s^22$p^3$

Question 12

Based on the cooling curve provided, what is the boiling point of the substance?

Accepted Answer

$$49\ ^\circ\mathrm{C}$$

Question 13

What is the number of valence electrons for an element with the electron configuration $$1s^22s^22$p^63s^23$p^64s^23$d^{10}4p^3$?

Accepted Answer

5 valence electrons

Question 14

Based on two isotopes, the atomic mass of Cl is $$35.45$$ amu. What is the percent abundance of the isotope with mass $$36.97$$ amu if the other isotope ($$34.97$$ amu) has an abundance of $$75.76\%$$?

Accepted Answer

26.49\%

Question 15

A 20.0 g piece of metallic iron (Fe) at $$25.0\ ^\circ\mathrm{C} is $$exposed to $$681 J of $$heat energy. What is the final temperature of the metal? (Specific heat capacity of Fe $$= 0.452 J/(g$$·°C))

Use $$q = m c \Delta T.$$

Accepted Answer

$$100.3\ ^\circ\mathrm{C}$$

Question 16

Which of the following atomic orbitals corresponds to a $$d$$ orbital?

Accepted Answer

Orbitals III and IV

Question 17

Which of the following is equivalent to $$275\ ^\circ\mathrm{C}$$?

Accepted Answer

$$307\ ^\circ\mathrm{F}$$

Question 18

To a sample of liquid water, $$155 kJ of $$heat is added to vaporize all the liquid at $$100\ ^\circ\mathrm{C}. $$What is the mass of the water sample? ($$\Delta H_{vap} = 2260 J/g)$$

Accepted Answer

68.6 g of water

Question 19

A tablespoon of clover honey contains $$17 g of $$carbohydrate but no measurable fat or protein. What is the total amount of nutritional Calories (Cal) obtained by a tablespoon of clover honey? (Carbohydrate $$= 4$$ kcal/g, Fat $$= 9$$ kcal/g, Protein $$= 4$$ kcal/g)

Accepted Answer

68 Cal

Step-by-Step Guidance for CHEM:1070 General Chemistry I Sample Exam 1

Guida di studio - Domande di pratica

Study guide - Flashcard