Questions in Grade High-school

Questions in Grade High-school

[Homework Help] The maximum energy available for useful work from a spontaneous reaction: A. free energy B. lattice energy C. kinetic energy D. activation energy E. ionization energy

[Homework Help] A figure consists of a square and a semicircle, as shown in the diagram below. If the length of the square is 6, what is the area of the shaded region?

[Homework Help] Use substitution to solve the system: \[ 5x - 3y = -20 \] \[ x = 3y - 16 \]

[Homework Help] Which of the following aqueous solutions would have the greatest freezing-point depression? A. 0.10 m (NH₄)₂SO₄ B. 0.10 m MnSO₄ C. 0.10 m NaF D. 0.10 m KCl E. 0.10 m CH₃OH

[Homework Help] How would I solve these? 1. \[ (-3xy)^3 (-x^3) \] 2. \[ (-9b^2a^3)^2 (3^3b)^2 \]

[Homework Help] Which of the following was NOT a conclusion of Rutherford’s gold foil experiment? A. The atom is mainly empty space B. The nucleus has a negative charge C. The atom has a dense nucleus D. Alpha particles can pass through a thin sheet of gold foil E. All of the above are correct regarding the gold foil experiment

[Homework Help] Determine the maximum or minimum, as well as the domain and range, of the function: \[ y = x^2 - 4x + 4 \]

[Homework Help] Which of the following statements about antibodies is false? A. Antibodies are produced by different combinations of soluble proteins in the blood called complement. B. When antibodies bind to a bacterial cell, it may keep that cell from adhering to host cells. C. The specific receptors on T cells that would interact with a specific antigen are the same shape as antibodies that will interact with that antigen. D. By binding to antigens, antibodies mark those antigens for destruction by macrophages. E. By binding to an invader, antibodies attract proteins that lyse the target membrane.

[Homework Help] The ionization energy of an element is: a. a measure of its mass b. the energy required to remove an electron from the element in its gaseous state c. the energy released by the element in forming an ionic bond d. the energy released by the element upon receiving an additional electron e. none of the above

[Homework Help] Which kind of bonds are most easily broken in water? A. ionic B. peptide C. disulfide D. single covalent E. double covalent