What is the density of a 15cm3 iron bar that has a mass of
120g?...
Chemistry, 03.04.2020 01:55 Nigward666
What is the density of a 15cm3 iron bar that has a mass of
120g?
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
Chemistry, 22.06.2019 11:50
Calculate the molarity of each of the following solutions. part a) 0.12 mol of lino3 in 5.5 l of solution part b) 60.7 g c2h6o in 2.48 l of solution part c) 14.2 mg ki in 100 ml of solution
Answers: 2
Chemistry, 22.06.2019 19:40
What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m
Answers: 1
Mathematics, 07.01.2021 22:00
Physics, 07.01.2021 22:00
Mathematics, 07.01.2021 22:00
Mathematics, 07.01.2021 22:00
English, 07.01.2021 22:00
Physics, 07.01.2021 22:00
Mathematics, 07.01.2021 22:00
History, 07.01.2021 22:00
Mathematics, 07.01.2021 22:00
Mathematics, 07.01.2021 22:00
Mathematics, 07.01.2021 22:00
Spanish, 07.01.2021 22:00
Advanced Placement (AP), 07.01.2021 22:00