Which statement about weak bonds is correct?

What does it mean when substance are move against a concentration gradient?

Are phosphorous and oxygen covalently or ionically bonded?

Which hydrocarbon will provide more heat when allowed to react with oxygen? Hint: Use the heat of combustion data in the alkane properties table. a. C 6 H 14 b. C 6 H 12 c. C 2 H 6 d. C 3 H 8

Which of the following is not a characteristic of science? science is a process. science is a body of knowledge. science must follow the scientific method. science is not testable.

3. Write the mathematical relationship of ideal gas law?

15.00 g of NH4HS (s) is introduced into a 500. mL flask at 25 °C, the flask is sealed, and the system is allowed to reach equilibrium. What is the partial pressure of ammonia in this flask if Kp = 0.108 at 25 °C for: NH4HS (s) ⇄ NH3 (g) + H2S (g) ?

Among elements 1-18, which element or elements have the smallest effective nuclear charge if we use the equation zeff=z-s to calculate zeff? check all that apply.

Two clear solutions are placed in separate beakers. The first solution has a pH of 4, and the pH of the second solution is unknown. If the two solutions are mixed and the resulting pH is 5, the second solution must have

Based on its location on the periodic table, which element (s) have properties similar to N? Choose all that apply. * P C O Bi

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?