Chemistry Answers

Draw structures and identify two geometric isomers of c4ch8

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

What do you understand by DSC? How can it be used to identify the impurity in a compound?

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

Reaction of Grignerd Reagent for alcohol

R-MgX + HCHO

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.

products of Propanoic anhydride and Ethanol, with heating.