What is the total number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne?

(1) 1 (3) 3

(2) 2 (4) 4

Which of the following is not a redox reaction? A. H2O (l) + NH3 (g) LaTeX: / longrightarrow NH4 + (aq) + OH - (aq) B. 2H2 (g) + O2 (g) LaTeX: / longrightarrow 2H2O (l) C. Zn (s) + H2SO4 (aq) LaTeX: / longrightarrow ZnSO4 (aq) + H2 (g) D.

Given the following dаta: 2O3 - > 3O2 (enthalpy = - 427 kJ) O2 - > 2O (enthalpy = + 495 kJ) NO + O3 - > NO2 + O2 (enthalpy = - 199 kJ) Calculate the enthalpy for the reaction NO + O - > NO2 using Hess's Law ...?

As heat is added to a tube of gas, which is the most likely phase transition to occur in the tube? gas to plasma gas to liquid gas to solid gas to element

What is normal body temperature in degrees celsius? express your answer numerically in degrees celsius?

What snail shaped object in the ear contains thousands of nerve cell and is crucial to hearing sound

Arrange the elements in order of increasing atomic radius Mg Ba F S

Based on the enthalpy changes given for the reactions, which reactions are endothermic? (check all that apply) 2H2O → 2H2 + O2, ΔH = 484 kJ C + O2 → CO2, ΔH = - 394 kJ H2 + Br2 → 2HBr, ΔH = - 73 kJ 2NH3 → N2 + 3H2, ΔH = 92 kJ

Which of the following is not true about performing biological investigations reading and understanding Metric system

At 29°C, Kp = 5.3 ✕ 102 atm-2 for the following reaction. N2 (g) + 3 H2 (g) equilibrium reaction arrow 2 NH3 (g) When a certain partial pressure of NH3 (g) is put into an otherwise empty rigid vessel at 29°C, equilibrium is reached when 55.

If ice is heated at constant pressure of 0.0512 ATM will it