What is the total number of molecules represented by the following equation? 2C4H10 (g) + 13O2 (g) 8CO2 (g) + 10H2O (g) ?

A 18

B 4

C 15

D 33

Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to 1/4.00 of the original amount. How long ago was this plant alive?

Which process is a genetic engineering process? 1) exposing food to radiation, which causes mutation in the genes 2) removing DNA from cells of the food 3) replacing some genes of the food with genes from other species 4) protecting food with an

How many moles are in 123.0grams of KCIO4?

Which notation represents the largest atomic radius? a. Cl b. Cl c. f d. F

Which functional group can have a positive charge when it picks up a proton from water?

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.