Chemistry, 21.08.2021 19:10 jfernald5658
If you fill up a balloon with a small amount of air then set it in direct sunlight you'll see that the balloon expands this expansion is due to an increase in volume which results from...
Answers: 2
Chemistry, 22.06.2019 01:30
100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
Answers: 1
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, 23.06.2019 00:50
What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol
Answers: 1
If you fill up a balloon with a small amount of air then set it in direct sunlight you'll see that t...
Mathematics, 09.12.2021 22:00
Law, 09.12.2021 22:00
Mathematics, 09.12.2021 22:00
Mathematics, 09.12.2021 22:00
English, 09.12.2021 22:00
SAT, 09.12.2021 22:00
Mathematics, 09.12.2021 22:00
Computers and Technology, 09.12.2021 22:00
History, 09.12.2021 22:00
Mathematics, 09.12.2021 22:00
Mathematics, 09.12.2021 22:00
Geography, 09.12.2021 22:00
Social Studies, 09.12.2021 22:00