Which of the following elements is a highly reactive nonmetal? A. iron (Fe) B. sodium (Na) C. flourine (F) D. helium (He)

Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Based on this trend, an electron will be most strongly attracted to

In aluminum are electrons lost or gained

Which of the following chemical reactions is an oxidation-reduction reaction? a. CuSO4 + BaCl2 yields BaSO4 + CuCl2 b. Pb (NO3) 2 + 2NaCl yields PbCl2 + 2NaNO3 c. N2 + 3H2 yields 2NH3 d. K2SO4 + BaCl2 BaSO4 + 2KCl

The concentration of C6H12O6 may be represented as O (C6H1206) O {C6H1206} O [C6H1206]

The molecules of a gas at constant volume are somehow given a lower average kinetic energy. What two measurable properties of the gas will change and in what direction?

Consider the following reaction where Kp = 4.55*10-5 at 723 K: N2 (g) + 3H2 (g) ⇋ 2NH3 (g) a) If the three gases are mixed in a rigid container at 723 K so that the partial pressure of each gas is initially one atm, what will happen?

Which terms are used to identify pure substances? (1) an element and a mixture (2) an element and a compound (3) a solution and a mixture (4) a solution and a compound

Which of the following polyatomic ions will form an ionic compound with two sodium ions? CO32- HCO31- NO21- NO31-

What is hybridisation

2. Seorang ibu perlu menyediakan satu hidangan kari daging dengan cepat untuk anaknya yang lapar. Langkah manakah yang berikut dapat membantu dia mencapai tujuan ini? (CL01, C2) A. Menggunakan periuk yang lebih besar B. Menambah banyak serbuk kari C.