Answers: 1
Chemistry, 22.06.2019 06:00
An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have
Answers: 2
Chemistry, 22.06.2019 23:30
The density of benzene at 15 °c is 0.8787 g/ml. calculate the mass of 0.1500 l of benzene at this temperature. enter your answer in terms of grams
Answers: 2
Chemistry, 23.06.2019 06:30
The molar mass of cu is 63.55 g/mol. the number of grams of cu produced in this reaction is
Answers: 3
Chemistry, 23.06.2019 11:20
The chemical composition of soil varies with depth. an article in communications in soil science and plant analysis describes chemical analyses of soil taken from a farm in western australia. fifty specimens were each taken at depths 50 and 250 cm. at a depth of 50 cm, the average no3 concentration (in mg/l) was 88.5 with a standard deviation of 49.4. at a depth of 250 cm, the average concentration was 110.6 with a standard deviation of 51.5. find a 95% confidence interval for the difference in no3 concentrations at the two depths.
Answers: 1
Using the periodic table, determine the number of neutrons in 16O...
History, 09.12.2020 22:00
Mathematics, 09.12.2020 22:00
Health, 09.12.2020 22:00
Mathematics, 09.12.2020 22:00
Mathematics, 09.12.2020 22:00
Chemistry, 09.12.2020 22:00