When issuing shares of stock, what par value can a corporation assign to each share?

Write a program to open a file and ask the user to input the filename. If the file exists, display the content of the file, else create a file and write the line “File is opened in write mode”.

$\text{\red{Apply Concepts}}$ How do limiting factors affect the growth of populations?

For each of the following sentences, add end marks where needed. Also, underline any errors in the use of abbreviations and write the correction above the error.

Example 1. Will $\underline{\text{Mister}}$ (Mr.) Benson be our teacher next year?

6. Ms Barbara Ayala leaches ballet at our school.

An electron is in the $n$th Bohr orbit of the hydrogen atom. (d) How does the above calculation support the "electron cloud" concept?

Tu parles a ton prof d'informatique et tu veux savoir les choses suivantes: comment imprimer un document, ce qu'il/elle utilise comme moteur de recherche (search engine), et ce qu'il/elle recommande comme logiciel de traitement de texte (word processing soffware). Ecris ta conversation.

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$Ton$ $prof$ $\rule{1cm}{1pt}$

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$Toi$ $\rule{1cm}{1pt}$

$Ton$ $prof$ $\rule{1cm}{1pt}$

Although the electron affinity of bromine is a negative quantity, it is positive for Kr. Use the electron configurations of the two elements to explain the difference.

Use conservation of angular momentum to estimate the angular velocity of a neutron star which has collapsed to a diameter of $10$ km, from a star whose radius was equal to that of our Sun $(7\times10^8$ m$)$, of mass $1.5$ times that of the Sun, and which rotated (like our Sun) about once a month.

Mr. John Hailey has $\$1,000$ to invest in the market. He is considering the purchase of 50 shares of Comet Airlines at $\$20$ per share. His broker suggests that he may wish to consider purchasing warrants instead. The warrants are selling for $\$10$, and each warrant allows him to purchase one share of Comet Airlines common stock at $\$18$ per share. If the price of the stock goes to $\$40$, what would be his total dollar and percentage return on the stock?

What factors may cause the effective interest rate and the stated interest rate to be different?

What takes place when an electron moves parallel to a magnetic field and when an electron moves perpendicular to a magnetic field?

Tell what is meant by: (a) An electron-deficient molecule (b) A three-center, two-electron bond Illustrate each definition with an example.

Express each polynomial as a product of linear factors.

$$p(x)=x^3-3 x^2-10 x+24$$

Give the symbol of the element with the following electron or abbreviated electron configuration: $\mathrm{1s^22s^22p^63s^23p^6}$.