Very important!

How do enzymes catalyze chemical reactions?

By giving up electrons

By positioning substrates and destabilizing bonds

By acting as substrates and forming new products

By being used up in the reaction

A student is given an antacid tablet that weighed 5.6832 g The tablet was crushed and 4.3628 g of t he antacid was added to 200 mL of simulated stomach acid. This was allowed to react and then filtered. It was found that 25.

Select the correct answer. Which subatomic particle is electrically neutral and found in the nucleus of an atom? A. proton B. neutron C. electron D. orbital E.

What happens to valence electrons in a metallic bond?

Describe the evidence for the existence of electrons?

Suppose that NaCl is added to hexane (C6H14) instead of water. Which of the following intermolecular forces will exist in the system? Check all that apply.

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.

Which of the following statements is not true? Question 4 options: When atoms have similar electronegativities, electrons are shared equally When electrons are shared equally, the molecule is called a nonpolar molecule.