Exams & Certification

When 560,000 is written in scientific notation, the power of 10 is The Correct Answer and Explanation is: To write 560,000 in scientific notation, we need to express the number as a product of a coefficient and a power of 10. The general form for scientific notation is:N=C×10nN = C \times 10^nN=C×10n where: Step 1: […]

‘Which of the following is a STRONG base? NO3 b. CH3OH KOH d_ NH3 Cl’ The Correct Answer and Explanation is: The correct answer is KOH. A strong base is a substance that completely dissociates in water to release hydroxide ions (OH⁻). In the given options: Explanation:KOH dissociates in water as follows: KOH(aq)→K+(aq)+OH−(aq)KOH (aq) \rightarrow

Why is it hotter at the equator than it is at the poles? a. Because the equator is closer to the sun. … Because the sun’s rays hit the earth’s surface at a higher angle at the equator. The Correct Answer and Explanation is: The correct answer is: Because the sun’s rays hit the earth’s

Regarding the problem above, the lattice energy of rubidium chloride is the energy change accompanying the process: RbCl(s) → Rb(g) + Cl(g) ΔHlattice Calculate the lattice energy of RbCl using the following data: Equation MH? (kJ) Eq A Rb(g) → Rb(s) 83 Eq B Rb(g) → Rb(g) 411 Eq C Cl(g) → 2Cl(g) 244 Eq

DNA replication is said to be semiconservative because: One of the new molecules conserves both of the original DNA strands. The new DNA molecule contains two new DNA strands. Both of the new molecules contain one new strand and one old strand. DNA polymerase conserves both of the old strands. The Correct Answer and Explanation

Use the data provided below to calculate the lattice energy of RbCl. Is this value greater or less than the lattice energy of NaCl? Explain. Electron affinity of Cl = -349 kJ/mol 1st ionization energy of Rb = 403 kJ/mol Bond energy of Cl2 = 242 kJ/mol Sublimation energy of Rb = 86.5 kJ/mol ΔH°[RbCl

DNA replication is said to be semiconservative because: One of the new molecules conserves both of the original DNA strands. The new DNA molecule contains two new DNA strands. Both of the new molecules contain one new strand and one old strand. DNA polymerase conserves both of the old strands. The Correct Answer and Explanation

Use the data provided below to calculate the lattice energy of RbCl. Is this value greater or less than the lattice energy of NaCl? Explain. Electron affinity of Cl = -349 kJ/mol 1st ionization energy of Rb = 403 kJ/mol Bond energy of Cl2 = 242 kJ/mol Sublimation energy of Rb = 86.5 kJ/mol ΔH°[RbCl

Write the decimal as a percent 0.32 ?2. Write the decimal as a percent 2.86 ?3. Write the fraction as a percent 44/100 ?4. Write the mixed number as a percent 4 3/5 ?5. Write the fraction as a percent 5/2 ?6. Write the percent as a decimal. Round to the nearest thousandth if the

How does concentration and surface area affect cell potential? The Correct Answer and Explanation is: Cell potential, also known as electrode potential or electrochemical potential, refers to the ability of a half-cell to drive an electric current in an electrochemical reaction. The concentration and surface area of the electrodes play significant roles in determining the