10.0g of XHCO^3 was dissolved in water and made up to 1.0dm^3. If 25.00cm^3 of the solution required 24.90cm^2 of 0.100 moldm^-3 HCl for neutralization, calculate the molar mass of the acid salt and the atomic mass X

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.