QUESTION 01 Which of the following elements is not a representative (typical) element? Zn Mn Ca Si Ar 🔍...

QUESTION 02 Which of the following atoms has a different number of neutrons from electrons? \(\ce{^4He}\) \(\ce{^{14}N}\) \(\ce{^{16}O}\) \(\ce{^{32}S}\)...

QUESTION 03 Which of the following atoms has the smallest number of valence electrons? Cl Be Al Ne Na...

QUESTION 04 Which of the following molecules has the same number of shared electron pairs as unshared electron pairs...

QUESTION 05 Which of the following salts shows acidic when it dissolves in water? \(\ce{Na2CO3}\) \(\ce{CaCl2}\) \(\ce{NH4Cl}\) \(\ce{CH3COONa}\) \(\ce{K2SO4}\)...

QUESTION 06 A 250 mL solution is produced by dissolving 0.10 g of sodium hydroxide in sufficient water. What...

QUESTION 07 When 10 mL of 1.0 mol/L sulfuric acid reacts with 1.0 g of \(\ce{NaOH}\), how much reactant...

QUESTION 08 Calculate the density of hydrogen, \(\ce{H2}\), gas at standard state. 0.045 g/L 0.089 g/L 0.18 g/L...

QUESTION 09 The solubilities of potassium nitrate, \(\ce{KNO3}\), in water are 40 at 27°C, and 169...

QUESTION 10 How much heat is released by the following reaction when 0.25 mol of sodium reacts completely with...