Chemistry, 23.03.2021 01:30, trying2passs
how will the mass of the magnesium hydroxide change if a small amount of acid is added to the solution?
Answers: 2
Chemistry, 22.06.2019 11:40, Wemaybewrong
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 23.06.2019 06:30, morganzahn16
1.17 mol hcl and 2.5 mol naoh react according to the equation hcl + naoh -> nacl + h2o . if the limiting reactant is hcl, determine the amount of excess reactant that remains. answer in units of mol.
Answers: 1
how will the mass of the magnesium hydroxide change if a small amount of acid is added to the soluti...
Mathematics, 23.01.2020 03:31
Mathematics, 23.01.2020 03:31
Chemistry, 23.01.2020 03:31
Mathematics, 23.01.2020 03:31
Mathematics, 23.01.2020 03:31