Blog

When a 2.150-g sample of glucose, C6H12O6, is burned in a bomb calorimeter with a heat capacity of 6.317 kJ/°C, the temperature of the calorimeter increases from 23.446°C to 28.745°C. Calculate ∆E for the combustion of glucose in kJ/mol.

When a 2.150-g sample of glucose, C6H12O6, is burned in a bomb calorimeter with a heat capacity of 6.317 kJ/°C, the temperature of the calorimeter increases from 23.446°C to 28.745°C. Calculate ∆E for the combustion of glucose in kJ/mol.

Given the following equations and ∆H° values:                                                               OF2(g) + H2O(l) → O2(g) + 2 HF(g) ∆H° = -276.6 kJ SF4(g) + 2 H2O(l) → 4 HF(g) + SO2(g) ∆H° = -827.5 kJ S(s) + O2(g) → SO2(g) ∆H° = -296.9 kJ  determine the heat of reaction (kJ) at 298 K for the reaction:  2 OF2(g) + 2 S(s) →SO2(g) + SF4(g) Must show your work (scratch paper) to receive credit.

Use the standard enthalpies of formation provided to calculate the change in enthalpy for the reaction below: 5 CO(g)  +  11 H2(g) → C5H12(l)   + 5 H2O(l)      ΔH°f (kJ/mol) CO(g)  – 110.5 H2O(l)  – 285.8 C5H12(l)    – 146.8 Must show your work (scratch paper) to receive credit.

A typical television remote control emits radiation with a wavelength of 940 nm. A photon of that light has a frequency of [a]Hz and an energy of [b] J. Must show your work (scratch paper) to receive credit. 

Write the full electron configuration for Ca: (Do not consider exceptions. Make sure to follow the order following the Aufbau principle, use the following format without superscripts: 1s2 2s2 2p6…)

Write the condensed (short form) electron configuration for Hf:( Make sure to follow the order following the Aufbau principle. Do not consider exceptions. Do not use superscripts, do not write the brackets on the noble gas. Use the following format Ne – 3s2 ….)

 Choose the best Lewis structure for ICl5.

A reactive element with a relatively high electronegativity would be expected to have a relatively

Place the following types of electromagnetic radiation in order of increasingwavelength.             visible light           x-rays              microwaves