General Chemistry Answers

what are examples of soluble salts metals + acids

is there a catalyst in sunscreen/is it a catalyst? if yes, then what, & how does it speed up the reaction? idk

The reaction between hydrazine and hydrogen peroxide is shown in the balanced chemical equation N₂H₄ + 7 H₂O₂   2 HNO₃ + 8 H₂O. If 4.0 moles of hydrazine were used up in the reaction, the number of moles of water produced would total

How many moles are in 5.8 x 10²⁴ water molecules?

10) The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H+ ions; that is, ∆H°f [H+(aq)]=0.

a) For the following reaction

H2O

 HCl(g)

Calculate the ∆H°f for the Cl- iron.

H+(aq) + Cl- ∆H°=-74.9 kJ/mol

b) Given that ∆H°f for OH- ions is -229 kJ/mol, calculate the enthalpy of neutralization when 1 mole of a strong monoprotic acid (such as HCl) is titrated by 1 mol of a strong base (such as KOH) at 25°C.

The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H+ ions; that is, ∆H°f [H+(aq)]=0.

a) For the following reaction

H2O

 HCl(g)

Calculate the ∆H°f for the Cl- iron.

H+(aq) + Cl- ∆H°=-74.9 kJ/mol

b) Given that ∆H°f for OH- ions is -229 kJ/mol, calculate the enthalpy of neutralization when 1 mole of a strong monoprotic acid (such as HCl) is titrated by 1 mol of a strong base (such as KOH) at 25°C.

On mélange 8.6g de toluène, C7H8 (Masse molaire = 92g/mol) avec 59.08 g de permanganate de potassium, KMnO4 (Masse molaire = 158g/mol). Cette réaction a un pourcentage de rendement en benzoate de potassium, KC7H502 (Masse molaire = 160g/mol), inférieur à 100%.

C7H8(l) + 2 KMnO4(aq) KC7H502(aq) + 2MnO2(S) + KOH(aq) + H2O(l)

a) Détermine le RL.

How much water should be added to 100ml of 18.0 M H2SO4 in order to dilute it down to a concentration of 3.50 M?

How many grams of barium sulfate would be needed to create 0.650 liters of a 1.5 m solution

Calculate the mass of Hydrogen atoms in 3.00 moles of copper(II) sulfate pentahydrate, CuSO4.5H2O