Introduction to Mastering Chemistry

Practice entering numbers that include a power of 10 by entering the diameter of a hydrogen atom in its ground state, dH=1.06×10−10m, into the answer box. Express the diameter of a ground-state hydrogen atom in meters using a power of 10. Do not enter the units; they are provided to the right of the answer box.

1.06*10^-10

Which is NOT an element in developing expertise in a field?

Giving up.

How do you develop a growth mindset and embrace your mistakes?

Question what went wrong and fix the problem in a new strategy.

Which of the following describes a growth mindset, as opposed to a fixed mindset?

** All of the above: ** Learning and growing your brain helps performance in school Believing your talents, abilities, and intelligence can be developed in different ways Challenging yourself by persisting longer with problems helps to grow your mental muscle

Each of these geometric shapes has a different number of sides. Arrange the shapes in order from the shape with the greatest number of sides to the shape with the fewest number of sides. Rank these shapes from greatest to fewest number of sides. To rank items as equivalent, overlap them.

1. octagon 2. hexagon 3. pentagon 4. rectangle and square (Note to whoever is studying: place these on top of each other or your answer will be marked as incorrect.) 5. triangle

For most answers, you will simply enter your numeric answer directly into the space provided to the right of the equal sign. Answer the following question by typing the numeric answer into the answer box. If you have a gross of items, you have 144 items. If you buy a gross of eggs, how many dozen eggs do you have? Express your answer in dozens. Do not enter the units; they are provided to the right of the answer box.

12 dozen

A friend in your class tells you that she never uses hints when doing her Mastering homework. She says that she finds the hints helpful, but when the hint asks another question it increases the chance that her score on the problem will go down. She feels like it isn't worth the risk.You reassure her that there is nothing to fear about opening a hint that asks a question. Which of the following are good reasons for your friend not to worry? Select all that apply.

As an incentive for thinking hard about the problem, your instructor may choose to apply a small hint penalty, but this penalty is the same whether the hint simply gives information or asks another question. The only way to lose additional partial credit on a hint is by using the "Request Answer" button or entering incorrect answers. Leaving the question blank will not cost you any credit. Getting the correct answer to the question in a hint actually gives you some partial credit, even if you still can't answer the original question.

Why is the word "yet" powerful in developing a growth mindset?

It encourages you to continue along your learning journey, as you have not yet reached the final destination.

How do people with a growth mindset view and respond to challenges?

They see challenges as opportunities to learn and push their abilities.

When entering large numbers in the answer box, do not use commas. For example, enter 1276400 for the number 1,276,400. Do not enter 1,276,400. If you accidentally enter commas, you will get a message that your answer is incorrect. Answer the following question by typing the numeric answer into the answer box. What is the sum of 9260 and 3240? Express your answer numerically to at least three significant figures.

12500

Multiple-choice questions have a special grading rule determined by your instructor. Assume that your instructor has decided to grade these questions in the following way: If you submit an incorrect answer to a multiple-choice question with n options, you will lose 1/(n−1) of the credit for that question. Just like the similar multiple-choice penalty on most standardized tests, this rule is necessary to prevent random guessing.If a multiple-choice question has five answer choices and you submit one wrong answer before getting the question correct, how much credit will you lose for that part of the question?

25%

What is the magic number? (Figure 2) Note that there is a figure also associated with this part. However, the figure for Part A may still be visible on the left. To view the figure associated with Part B, click on the figure link. A new figure should appear on the left. You could try to guess the magic number but you would probably use up all your tries before getting the answer. Notice the View Available Hint(s) link underneath the question statement for this part. Clicking this link will open up a list of clickable hints that will guide you to the correct number.

60

How do students with a growth mindset see their mistakes?

As opportunities to learn and improve their brain.

Enter the molecular formula for butane, C4H10. Express your answer as a chemical formula.

C4H10 (Note to whoever is studying: Make sure the numbers are written in subscript or this answer will be incorrect.)

What is neuroplasticity?

The ability to make new and stronger connections between the neurons in our brain as we learn.

What is required to access Dynamic Study Modules?

** All of the above: ** A current Mastering username and password Previously signing in from a desktop, if using DSM on the mobile app Enrollment in a course that uses Mastering with Dynamic Study Modules

Enter the expression 147N+α, where α is the lowercase Greek letter alpha. Express your answer as a chemical expression.

14 7 N+α (Note to whoever is studying: Make sure to use the button to create 14 OVER 7. It's not a fraction or division. The button is located above the answer field.)

Enter the chemical equation 2H+(aq)+S2−(aq)→H2S(g). Express your answer as a chemical equation.

2H^+ (aq) + S^2- (aq)→H2S(g) (Note to whoever is studying: Make sure the number 2 in H2S(g) is written in subscript or this answer will be incorrect.)

If you are asked to provide a set of two or more numeric answers, separate them with commas. For example, to provide the year that Sputnik (the first satellite to be sent into orbit around the Earth) was launched and the year humans first walked on the Moon, you would enter 1957,1969 in the answer box. A rectangle has a length of 5.50 m and a width of 12.0 m. What are the perimeter and area of this rectangle? Enter the perimeter and area numerically separated by a comma. The perimeter should be given in meters and the area in square meters. Do not enter the units; they are provided to the right of the answer box.

35.0, 66.0

How many squares are in this 2×2 grid (Figure 1)? Note that the figure link lets you know that a figure goes along with this part. This figure is available to the left. Enter your answer as a number in the box below and then submit your answer by clicking Submit.

5

You've just solved a problem and the answer is the mass of an electron, me=9.11×10−31kilograms. How would you enter this number into the answer box? Enter your answer in kilograms using three significant figures. Note that the units are provided for you to the right of the answer box.

9.11*10^-31

What is the primary function of Dynamic Study Modules?

Assess what a student already knows, and where he or she may want to focus additional study.

Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42−. Separate the ions with a comma only—spaces are not allowed. Express your answers as ions separated by a comma.

Na+, SO4^2- (Note to whoever is studying: Make sure the number 4 in SO4^2- is written in subscript or this answer will be incorrect.)

You have been working on an item for a while and after a few missteps you've come up with an answer. However, there is one particular thing that you're not 100% sure of. What should you do?

Return to the question after you've spoken with an instructor or classmate. Check for any hints that address the part of the calculation you're unsure about. Submit your answer and then adjust it according to any feedback you receive.

You are starting a new item and after reading the first part you realize you have no idea how to go about answering it. What should you do?

Use the available hints.