Find the product.

(n + 8) (n - 2)

n2 - 6n - 16

n2 + 6n - 16

n2 - 6n + 16

Which of the following is NOT true regarding the structure of benzene? a) The carbon-carbon bonds rapidly alternate between single and double bonds. b) The C-C-C bond angles are 120°. c) The hydrogen atoms are equivalent.

when 4.008 g of calcium metal is heated in the air, the sample gains 1.600 g of oxygen in forming the oxide. Calculate the empirical formula of the calcium oxide.

The effort needed when a simple machine is used is best described by which of these statements? A) The effort force is always smaller than the force needed without the machine.

What is the rows in the periodic table of elements called

When sodium metal is added to water, the following reaction occurs: 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g) What is the theoretical number of moles of hydrogen gas should be produced when 0.068 mol of sodium metal reacts? a. 1.0 mol H2 b. 0.

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?

A scientist performs an experiment in which a radium-226 (Ra-226) atom decays into radon-222 (Rn-222). The scientist concludes that some energy must have been added to the system to cause this reaction to begin.