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
Marat540 [252]
3 years ago
13

What are the answers to these?

Chemistry
1 answer:
Eva8 [605]3 years ago
7 0

Answer:

1)physical change

Explanation:

2)chemical change

You might be interested in
How many liters of Cl2 gas will you have if you are using 63 g of Na?
ELEN [110]

Answer:

You will have 19.9L of Cl2

Explanation:

We can solve this question using:

PV = nRT; V = nRT/P

<em>Where V is the volume of the gas</em>

<em>n the moles of Cl2</em>

<em>R is gas constant = 0.082atmL/molK</em>

<em>T is 273.15K assuming STP conditions</em>

<em>P is 1atm at STP</em>

The moles of 63g of Cl2 gas are -molar mass: 70.906g/mol:

63g * (1mol / 70.906g) = 0.8885 moles

Replacing:

V = 0.8885mol*0.082atmL/molK*273.15K/1atm

V = You will have 19.9L of Cl2

6 0
3 years ago
What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of.
Citrus2011 [14]

Answer:

I think u understand this answers

4 0
3 years ago
Anhydrous copper sulphate can be used in a test for water. What two things will happen when water is added to anhydrous copper s
Misha Larkins [42]

Answer:

thanks bro for helping me thanku so much

3 0
2 years ago
Please help!! I have 10 minutes left!!
Licemer1 [7]

Explanation:

1 is a process that occurs when gases in earth's atmosphere trap the sun's heat .

2 . heat in the atmosphere to warm the planet .

I only know the first too sorry ✨

8 0
3 years ago
How many atoms of nitrogen on the reactant side
Taya2010 [7]

Answer:

2 nitrogen atoms

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following substances has the characteristics shown in the chart? A. homogeneous mixture B. compound C. solution D.
    14·1 answer
  • Which changes are evidence of a chemical reaction? drag each item to the appropriate bin?
    9·1 answer
  • This particle determines what element you have - the element's identity.
    10·1 answer
  • Rank these elements according to FIRST ionization energy, from highest to lowest:
    11·2 answers
  • Salt and water are the general products of which type of reaction?
    14·2 answers
  • Why does weathering cause erosion
    8·2 answers
  • Why Is It Important To Classify The Millions Of Species On Earth
    7·2 answers
  • What is the name for CH 3 CH 2 COCHCH 3 CH(CH 3 ) 2 ?
    13·1 answer
  • 25 g of a chemical is dissolved in 75 g of water. What is the percent by mass concentration of this chemical
    10·1 answer
  • Please help will give brainliest to right answer!!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!