Earth is said to be at the triple point for water. QUESTIONS: 1. How many atoms are in a water molecule? Be specific. 2. Why does a water molecule have polarity? 3. Why is Earth said to be at the triple point for water?

The electronic configuration of one element is \(1s^ 2 2s^ 2 2p^ 6 3s^ 2 3p^ 6 3d^ { 10} 4s^ 1\). What is same group which is recently discovered?

You need to calculate the enthalpy change \( \left(\Delta H^{0}\right) \) of the reaction \( \mathrm{A}+\frac{1}{2} \mathrm{~B} \rightarrow \mathrm{C} \). How can the enthalpies given for the reaction steps below be combined to give the overall change in enthalpy? \[ \mathrm{A}+\mathrm{B} \rightarrow \mathrm{D} \]

During a reaction, the enthalpy of formation of an intermediate is -286 \( \mathrm{~kJ} / \mathrm{mol} \). During the reaction, 2 moles of the intermediate are produced. What is the enthalpy value for this step of the reaction? A. -572 kJ B. 572 kJ C. 286 kJ D. -286 kJ

Which of these scholars laid the toundations tor modern chemistry?

Which is the correct Lewis structure for acetylene (\(C_ { 2} H_ { 2} \))?