Exams & Certification

Classify NH4NO3 as an acidic, basic, or neutral salt, and then answer the following question. What is the pH of 0.03 M NH,NO, (aq)? The Correct Answer and Explanation is : To classify NH₄NO₃ as an acidic, basic, or neutral salt, let’s break it down into its constituent ions: NH₄⁺ (ammonium ion) and NO₃⁻ (nitrate […]

F=9/5?C+32 C=5/9?(F·-32) K=C+273.15? You must show all of your work in the text box below, as in the A. a cyclone B. a hurricane C. a thunderstorm D. a tornado The Correct Answer and Explanation is : 1. Converting 68°F to Celsius: We will use the formula to convert Fahrenheit to Celsius: [C = \frac{5}{9}(F

The distnace from earth to the moon is 239,000 miles. a. how many kilometers are in 239000 miles? b. given that the light travels at 3.00*10^8 m/s , how many minutes does it take for light to travel to the moon ? c. The apollo 10 mission holds the record for the highest speed by

2.1 EXERCISES Solve each inequality. 2. 4x-8 > 2+ 3x 3. 7x-3 > 6x-2 1. 3n-9 > 2n-8 1 1 53 y + – — 12 4 5. 6. 8x – 72 7x-2 2 3 4. d + 3 2x + 7 10. 6x -+ 25x -5 11. – 8 4 18 6 13. 2x-2

According to NBA.com, Lebron James’ career free-throw percentage is 74%. However, during the 2016-2017 season, James’ free-throw percentage was only 67.4%. Some people may use this to argue that after 13 years in the NBA that Lebron has started to “go downhill” and should think about retirement. Do you agree or disagree? The Correct Answer

Draw the Lewis structure for XeF4 in the window below and then answer the questions that follow. Do not include overall ion charges or formal charges in your drawing D What is the electron-pair geometry for Xe in XeF4?What is the the shape (molecular geometry) of XeF42 The Correct Answer and Explanation is : Xenon

a) Draw the lewis structure for XeF4 and describe its structure using VSEPR (why it has a D4h symmetry) b) The XeF4 molecular orbital diagram is shown below, where there are four valence atomic orbitals for all the atoms but the F 2s orbitals do not take part in bonding i) Why are there 20

label the alpha, beta, gamma, and delta carbons in each of the structures below, as applicable, and give the name for the structure you may use either the common or the IUPAC name. The Correct Answer and Explanation is : In organic chemistry, the terms alpha (α), beta (β), gamma (γ), and delta (δ) are

Select all the atoms that have at least one lone (unshared) pair of electrons. • Gray = C; white H; red= 0; blue = N; dark green= Cl; brown Br; light green F; purple = 1; yellow S; orange – P • Double click to select atoms. You can zoom in and out using the

What does the term homozygous mean? What does the term homozygous mean? Having two identical alleles for a particular gene Having no alleles for a particular gene Having a mutation in a particular gene Having two different alleles for a particular gene The Correct Answer and Explanation is : The correct answer is: Having two