subject

Chemistry, 23.04.2020 22:52 jerrica988

A radioactive material initially has an activity of 800 counts per second. Eight hours later it has an activity of 200 counts per second. Find the materials half life

ansver

Answers: 2

Show answers

Another question on Chemistry

question

Chemistry, 22.06.2019 11:00

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Answers: 1

question

Chemistry, 22.06.2019 14:30

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Answers: 1

question

Chemistry, 22.06.2019 21:30

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.

Answers: 1

question

Chemistry, 22.06.2019 22:30

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?

Answers: 3

You know the right answer?

A radioactive material initially has an activity of 800 counts per second. Eight hours later it has...

Questions

question

Mathematics, 05.08.2019 00:30

Franco earns $8 per hour at his after-school job. last week, he received a paycheck of more than $168. if he worked for h hours that week, find all th...

question

Mathematics, 05.08.2019 00:30

Find 2x2 − 2z4 + y2 − x2 + z4 if x = −4, y = 3, and z = 2....

question

History, 05.08.2019 00:30

What were his chief objections to spanish rule...

question

Biology, 05.08.2019 00:30

Experts disagree on why worldwide per capita grain production has flattened off. what factors may be to blame...

question

Computers and Technology, 05.08.2019 00:30

How does static routing differ from dynamic routing? when would you use static routing? when would you use dynamic routing?...

question

Mathematics, 05.08.2019 00:30

After t seconds, the height h(t) of a model rocket launched from the ground into the air is given by the function below h(t)= -16t2 + 80t how long doe...

question

Mathematics, 05.08.2019 00:30

Adam can do a job in 10 days, while brenda takes 15 days to do it. after brenda works alone for 3 days, adam and brenda work together to finish the jo...

question

Computers and Technology, 05.08.2019 00:30

If you do not want the border style to carry forward each time the enter key is pressed, you need to...

question

Mathematics, 05.08.2019 00:30

After a 3% increase, the population of a city is 741000. what was the former population? (remember: do not use commas in your answer! )...

question

Mathematics, 05.08.2019 00:30

Arectangle has an area of k2+19k+60 square inches. if the value of k and the dimensions of the rectangle are all natural number, which statement about...

question

Mathematics, 05.08.2019 00:30

Find the value of x point the diagram is not to scale...

question

Mathematics, 05.08.2019 00:30

Gymnast clothing manufactures expensive soccer cleats for sale to college bookstores in runs of up to 500. its cost (in dollars) for a run of x pairs...

question

Physics, 05.08.2019 00:30

The period of a sound wave coming from an instrument is 0.002 seconds. what is the frequency of the sound?...

question

Mathematics, 05.08.2019 00:30

The perimeter of a triangular lot is 72 meters one side is 16 meters and the other side is twice the first side find the length of the third side can...

question

Biology, 05.08.2019 00:30

What type of muscles cannot be controlled consciously? arm muscles involuntary muscles leg muscles voluntary muscles...

question

History, 05.08.2019 00:30

Which statement does not describe a result of the automobile industry influence on the live during the roaring 20s a) other industries such as glass...

question

Mathematics, 05.08.2019 00:30

Ithought of a two digit number. this number is bigger than product of it's digits by 52. what was the number? there is more then one number. this i...

question

Biology, 05.08.2019 00:30

Combined flexion to isolate a single sternocleidomastoid is performed when there is a suspected or known asymmetry of strength in which muscles?...

question

History, 05.08.2019 00:30

Ferdinand was king of when he married isabella....

question

History, 05.08.2019 00:30

Explain why the war of 1812 sometimes referred to as "the second american revolution" and "mr. madison's war":...

More questions: Chemistry Another questions

Questions on the website: 13722367