Chemistry, 01.08.2019 05:00 algahimnada
An apprentice jeweler determines the density of a sample of pure gold to be 20.3 g/cm3. the accepted value is 19.3 g/cm3. what is the percent error of the jeweler's density measurement?
Answers: 2
Chemistry, 21.06.2019 18:20
Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0
Answers: 2
Chemistry, 22.06.2019 04:00
Acontainer holds 35.8 moles of gas under 10.0 atm of pressure at 70.0 c. what is the volume of the container?
Answers: 2
Chemistry, 22.06.2019 10:10
Stage in which a star’s outer layers have started to cool and grow outward?
Answers: 3
Chemistry, 22.06.2019 11:40
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
An apprentice jeweler determines the density of a sample of pure gold to be 20.3 g/cm3. the accepted...
Mathematics, 09.04.2021 02:40
Mathematics, 09.04.2021 02:40
Mathematics, 09.04.2021 02:40
Mathematics, 09.04.2021 02:40
English, 09.04.2021 02:40
History, 09.04.2021 02:40
Engineering, 09.04.2021 02:40