How many protons are in the radioactive isotope 10k?
40
19
21
20...
Chemistry, 11.01.2020 00:31 justiceemani12
How many protons are in the radioactive isotope 10k?
40
19
21
20
Answers: 2
Chemistry, 22.06.2019 01:30
There are main groups in the modern periodic table of elements
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 00:00
The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?
Answers: 1
Mathematics, 19.04.2021 08:10
Mathematics, 19.04.2021 08:10
Mathematics, 19.04.2021 08:10
Mathematics, 19.04.2021 08:10
Physics, 19.04.2021 08:10
History, 19.04.2021 08:10
History, 19.04.2021 08:10
Mathematics, 19.04.2021 08:10
Arts, 19.04.2021 08:10
Biology, 19.04.2021 08:10
Mathematics, 19.04.2021 08:10
Computers and Technology, 19.04.2021 08:10
Chemistry, 19.04.2021 08:10