Chemistry, 02.01.2020 08:31 lukerothbacher
Acontainer holds a pure sample of a radioactive substance with a half-life of 2 hours. which of the following statements are true?
a) after 1 hour, less than 50 % of the original atoms in the container will have decayed.
b) after 1 hour, more than 50 % of the original atoms in the container will have decayed.
c) after 2 hours, 50 % of the original atoms in the container will have decayed.
d) after 4 hours, 25 % of the original atoms will have decayed.
e) after 4 hours, the total number of atoms in the container will be reduced by 75 %.
Answers: 2
Chemistry, 21.06.2019 22:30
For the following, determine the type of reaction and then give products.
Answers: 2
Chemistry, 22.06.2019 02:30
When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.
Answers: 3
Chemistry, 22.06.2019 13:30
Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.
Answers: 2
Chemistry, 22.06.2019 20:00
Iam hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?
Answers: 1
Acontainer holds a pure sample of a radioactive substance with a half-life of 2 hours. which of the...
Mathematics, 27.01.2021 22:00
Biology, 27.01.2021 22:00
English, 27.01.2021 22:00
English, 27.01.2021 22:00
Mathematics, 27.01.2021 22:00
Mathematics, 27.01.2021 22:00
Mathematics, 27.01.2021 22:00
English, 27.01.2021 22:00
Chemistry, 27.01.2021 22:00
SAT, 27.01.2021 22:00
Mathematics, 27.01.2021 22:00
Mathematics, 27.01.2021 22:00
Mathematics, 27.01.2021 22:00