1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kipish [7]
3 years ago
13

A radioactive sample is placed in a closed container. Two days later only one-quarter of the sample is still radioactive. What i

s the half-life of this sample?
Chemistry
1 answer:
saveliy_v [14]3 years ago
8 0

Answer:

2

Explanation:

The sample has halved twice.

1/2 of 1/2 is 1/4, and 1/2 of 1 is 1/2.

You might be interested in
How many atoms are in 24.6 moles of carbon?
alina1380 [7]

Answer: There are 148.1412\times 10^{23} atoms of carbon in the given moles.

Explanation:

We are given 24.6 moles of carbon and we need to find the number of atoms.

According to mole concept:

1 mole of an element contains 6.022\times 10^{23} number of atoms.

So, 24.6 moles of carbon will contain 24.6\times 6.022\times 10^{23}=148.1412\times 10^{23} atoms.

Hence, there are 148.1412\times 10^{23} atoms of carbon in the 24.6 moles of carbon.

8 0
3 years ago
What is produced when 50mLs of carbon and 30mLs of oxygen react
dsp73

50ml of carbon dioxide.

hope this helps

3 0
4 years ago
Need help asp will give brainliest
Levart [38]

Answer:

Explanation:

1: the sciencetific name of a giant squid is called Architeuthis

2: i dont know I think it says diet but: Giant squid mostly eat deep water fishes and other squids.
3: the range of a Giant squid can be found in oceans around the world at depths of at least 2,950 feet, but their exact  range is unknown.

4, characteristics,

1: it has two large fins attached to its mantle.

2: the giant squid have many unique features, such as their ability to produce 'ink' to distract and deter predators.  

3:


facts,

1: Their eyes are the largest eyes in the animal kingdom and are about 10 inches

2: Their big eyes help them to spy objects in dark depths where most other animals would see nothing

3: Until 2005, nobody had ever seen a giant squid that was alive.

4: According to the stories, an huge squid would wrap its arms around a whale, causing a terrible fight to start. 
5: Giant squid have small fins at the rear of their mantles used for locomotion. 


Human IMPACT

Not only can squids and octopuses sense sound, but as it turns out, these and other so-called cephalopods might be harmed by growing noise pollution in our oceans—from sources such as offshore drilling, ship motors, sonar use and pile driving.

7 0
2 years ago
mark for review (will be highlighted on the review page) 11. a solution that contains a large amount of salt and a small amount
Naddik [55]
The answer is a. concentrated. (If the statement was instead that large amounts of water was involved and smaller amounts of salt, the answer would be instead c. dilute)
6 0
4 years ago
What process takes place before an article is published in a scientific journal/
Goshia [24]
Before an article is published in a scientific journal or in any "peer-reviewed" journal the article is reviewed thoroughly by scholars from the journal as well as peers or scholars of the articles author from the same field. This process occurs to provide credibility to the ideas being published and so that readers and other scholars can rely on the validity of the material being published. 
7 0
3 years ago
Other questions:
  • What is the definition of states of matter
    6·2 answers
  • Explain the properties of the substance around us depend on the atoms and molecules that compose them
    10·1 answer
  • What is the percent by mass of hydrogen in aspirin (c9h8o4)?
    13·2 answers
  • A 8.65-L container holds a mixture of two gases at 11 °C. The partial pressures of gas A and gas B, respectively, are 0.205 atm
    9·1 answer
  • What are the oxidation numbers for HCL
    13·1 answer
  • If He gas has an average kinetic energy of 4310 J/mol under certain conditions, what is the root mean square speed of O2 gas mol
    5·1 answer
  • In the reaction CaCO3 → CaO + CO2 100 grams of calcium carbonate (CaCO3) is observed to decompose upon heating into 56 grams of
    10·1 answer
  • Heroin was originally going to be called "wunderlich", a German word for wonderful, since one chemist thought the substance made
    10·1 answer
  • Calculate the molarity of a 150 g NaCl in 250 ml solution.
    14·1 answer
  • report the elements half life. if we start with 100g of your element (platinum) how long will it take to have 6.26g?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!