Chemistry, 28.12.2019 02:31 Hannahrose911
The half-life of potassium-40 is 1.3 billion years. if a rock that formed 2.6 billion years ago originally contained 5 grams of potassium-40, about grams of potassium-40 would be left in that rock today
Answers: 2
Chemistry, 22.06.2019 15:00
Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?
Answers: 2
Chemistry, 22.06.2019 21:20
40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume
Answers: 3
Chemistry, 22.06.2019 21:30
Isopropyl alcohol, (ch3)2choh, is a common solvent. determine the percent by mass of hydrogen in isopropyl alcohol. a) 6.71% h b) 13.4% h c) 25.0% h d) 53.3% h
Answers: 1
Chemistry, 22.06.2019 23:10
Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium.b)heavier than helium.c)the same weight as helium.d)dependent on the element that reacted with carbon.
Answers: 3
The half-life of potassium-40 is 1.3 billion years. if a rock that formed 2.6 billion years ago orig...
Mathematics, 05.03.2021 05:10
Mathematics, 05.03.2021 05:10
Mathematics, 05.03.2021 05:10
Mathematics, 05.03.2021 05:10
History, 05.03.2021 05:10
Geography, 05.03.2021 05:10
Mathematics, 05.03.2021 05:10
Mathematics, 05.03.2021 05:10
History, 05.03.2021 05:10
Computers and Technology, 05.03.2021 05:10
History, 05.03.2021 05:10