Chemistry Answers

In a titration, 10.0 ml of H2SO4 is required to neutralize 0.0400 mol of NaOH. From this data, the [H2SO4] is?

How many chloride ions are present in 1.7g of magnesium chloride crystalls( Avogadro's constant=6.0×10^3,Mg=24,Cl=35.5)

Using the moles of AgNo3 how many moles of Ag2CO3 will you have after the reaction is complete?

An alloy is prepared by mixing 60g copper and 70g zinc. Find the percentage by mass of copper and zinc.

If 465cm³ of SO2 can diffused through a porous partition in 30secs , how long will 620cm³ of hydrogen sulphide take to diffuse through the same (H=1,S=32,O=16)

400cm³ of gas x diffused through a porous pot in 2 minutes calculate the rate at which gas x diffused

What are the main inadequacies of the Bohr's model?

Rubbing alcohol, C₃H₇OH_(l) is sold as a 73.8 % v/v solution for external use only. What volume of pure C₃H₇OH_(l) is present in a 487 mL bottle? Express your answer to the nearest whole number.

Which term is the catalyst in the following reaction mechanism?

H2O2 + I– —> H2OH + IO–

H2O2 + IO– —> H2O + O2 + I–

a- H2OH

b- IO-

c- H2O2

d- H2O

e- none of the above

• Which element has atoms in the ground state with the greatest number of valence electrons?