• Help please...in chemistry!!!!!?

    a hydrate of potassium carbonate has the formula K2CO3.xH2O. Ten grams of the hydrate leave 7.93g of anhydrous salt on heating. What is the mass of anhydrous salt in 10g of hydrate? What is the mass of water in 10g of hydrate? how many moles of anhydrous salt are there in 10g of hydrate? how many moles of water are present in the hydrate for... show more
    a hydrate of potassium carbonate has the formula K2CO3.xH2O. Ten grams of the hydrate leave 7.93g of anhydrous salt on heating. What is the mass of anhydrous salt in 10g of hydrate? What is the mass of water in 10g of hydrate? how many moles of anhydrous salt are there in 10g of hydrate? how many moles of water are present in the hydrate for every 1 mole of K2CO3?
    1 answer · Chemistry · 1 decade ago
  • Physics stuff, plz clear my doubt! ?

    A rifle is aimed horizontally at a target 100m away. The bullet hits the target 0.15m below the aiming point. a) What's the bullet's time of flight? b) What is the muzzle velocity of the rifle?
    A rifle is aimed horizontally at a target 100m away. The bullet hits the target 0.15m below the aiming point. a) What's the bullet's time of flight? b) What is the muzzle velocity of the rifle?
    2 answers · Physics · 1 decade ago
  • Why is the 2nd ionisation energy of zinc lower than that of copper? ?

    supposed to involve 5 consecutive d-blocks elements, iron, cobalt, nickel, copper, and zinc.
    supposed to involve 5 consecutive d-blocks elements, iron, cobalt, nickel, copper, and zinc.
    1 answer · Chemistry · 1 decade ago
  • Why do the electrons in the 2p subshell have a higher energy than electrons in the 2s subshells?

    regarding the electronic structure of boron
    regarding the electronic structure of boron
    2 answers · Chemistry · 1 decade ago