Search & Filtering
if xylitol has a chemical formula of c5h12o5, what is the percentage of oxygen in the compound?
To determine the total hardness of given water sample n/20 solution
The energy for the following reaction was measured to be -1033.0 kJ/mol.
Mg(g) + 2 Cl(g) → MgCl₂(s).
Using this fact and the data in the table below, calculate the enthalpy (in kJ/mol) required to separate the ions from the lattice for this reaction:
MgCl₂(s) → Mg²⁺(g) + 2Cl⁻(g).
How many moles of NO(g) can be produced in the reaction of 3.00 mol NH3(g) and 4.00 mol O2(g) ?
4 NH3(g) + 5 O2(g) = 4 NO(g) + 6 H2O(l)
The percentage of nitrogen in a fertilizer designated as 6 12 8 is
If 190cmcube3 of hydrogen is collected at 26degree celcius and 736mmHg,calculate it volume at S.T.P (standard pressure is 760mmHg
TRUE OR FALSE
1. When solid is heated, the temperature rises until it reaches the melting point temperature.
2. Concentrated means that the amount of solute is relatively high.
3.The alcohol content of hard liquor is given by the term “ABV”, which is defined as twice the percentage by volume of ethanol present.
4. The attractive forces between neighboring particles are called intermolecular forces.
5. The dispersion forces of an element determines to which atom the shared electrons are closer.
Calculate the AH for the reaction S02)SO3(g) + using these two reactions:
+0 SO,
2(g) 2SO +0. 2(g) 2(g) 2 (g) 2SO3(0)
AH = -296.8 kJ
AH = -197.0 kJ
Calculate the AH for the reaction 2S+20F₂ (a)
+SF) 2 (9)
using the following thermochemical reactions. + 2HF
AH = -277 kJ
AH = -828 kJ
0₂ (9) SO ₂ (0) (g) +4HF OF 2 (0) SF 4 (g) (0) + 2H₂O
AH = -297 kJ
+0₂ 2(g) 2 (g)
1. The specific heat capacity of zinc is 0.388 J/g.˚C. Calculate the initial temperature of zinc block of mass 38g if the amount of heat supplied to it was 220 J and the maximum temperature reached by the zinc block was 55˚C.
