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
blsea [12.9K]
3 years ago
7

Water is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Whic

h Change of state has most likely taken place?
Chemistry
2 answers:
Andrew [12]3 years ago
7 0
It has take place as a solid  <span />
AlladinOne [14]3 years ago
4 0
Liquid to solid
When water freezes the molecules slow down
You might be interested in
Identify the element that cannot participate in nuclear fission reactions. (Hint: Think about the size of the atom.)
chubhunter [2.5K]
A or C I’m pretty sure
8 0
3 years ago
Cobalt-60 is a strong gamma emitter that has a half- life of 5.26 yr. The co balt-60 in a radiotherapy unit must be replaced whe
Alenkasestr [34]

<u>Answer:</u> The sample of Cobalt-60 isotope must be replaced in January 2027

<u>Explanation:</u>

The equation used to calculate rate constant from given half life for first order kinetics:

t_{1/2}=\frac{0.693}{k}

where,

t_{1/2} = half life of the reaction = 5.26 years

Putting values in above equation, we get:

k=\frac{0.693}{5.26yrs}=0.132yrs^{-1}

Rate law expression for first order kinetics is given by the equation:

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,

k = rate constant = 0.132yr^{-1}

t = time taken for decay process = ? yr

[A_o] = initial amount of the sample = 100 grams

[A] = amount left after decay process =  (100 - 75) = 25 grams

Putting values in above equation, we get:

0.132=\frac{2.303}{t}\log\frac{100}{25}\\\\t=10.5yrs

The original sample was purchased in June 2016

As, June is the 6th month of the year, which means the time period will be 2016+\frac{6}{12}=2016.5

Adding the time in the original time period, we get:

2016.5+10.5=2027

Hence, the sample of Cobalt-60 isotope must be replaced in January 2027

3 0
3 years ago
A particle that orbits the nucleus in an atom is called a(n)
MrMuchimi

Answer:

The correct answer is electrons.

Explanation:

The electrons refer to the negatively charged constituents, which are arranged in the orbits around the nucleus of an atom. It determines all the chemical and physical characteristics of an atom except the radioactivity and mass.  It is a stable subatomic particle witnessed in all the atoms and functioning as the chief carrier of electricity in solids.

5 0
3 years ago
Read 2 more answers
Which element will chemically combine with fluorine to combine salt?
Natali5045456 [20]

Answer:

When an atom of sodium and an atom of fluorine combine to form the salt, sodium fluoride, an ionic bond, is formed.

Explanation:

8 0
2 years ago
What does phenolphthalein turn pink?
Alex Ar [27]

Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments.

8 0
3 years ago
Other questions:
  • What is a hypothesis
    10·2 answers
  • Lab Investigator: Chemical reactions cannot be used for what?
    13·2 answers
  • Why does a sodium street lamp give off a different color light then a neon light
    10·1 answer
  • Don't steal points! Which of the following is a tertiary structure?
    15·1 answer
  • 200g of water at 34.5°C are added to 150g of water at 87.6°C. What is the final temperature of the mixture?
    12·1 answer
  • According to the reaction, below, how many grams of aluminum are needed to react fully with 100 grams of sulfur? 2AL + 3s - Al2S
    6·1 answer
  • The skeletal structure of Arachidonic acid, an essential fatty acid, is provided below. Arachidonic acid is best classified as:
    8·1 answer
  • What did the Curies demonstrate by studying pitchblende?
    9·2 answers
  • Think and Discuss the changes you can do around you at home or in your school to help the
    12·1 answer
  • What are the common properties of the following element groups:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!