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
nikklg [1K]
3 years ago
12

True or false? dry ice subliming (turning from a solid straight into a gas) is an example of a chemical change.

Chemistry
1 answer:
Over [174]3 years ago
5 0
False because when a substance changes from one state of matter to another it is a physical change no matter how many states of matter it skips




You might be interested in
A student carried out a simple distillation on a compound known to boil at 124 oc and they reported a boiling point of 116-117 o
chubhunter [2.5K]

Answer :

The correct answer is due to incorrect position of thermometer .

Distillation  is process of separating two volatile liquids on the basis of their boiling points .In involves the following set up ( shown in image )

Since the Boiling point is found   is 116-117 C which is near to 124 C , also the purity was checked and thermometer was calibrated .

So the only error could be possible is position of thermometer .

The position of  bulb of thermometer is very important to get an accurate reading of boiling point .The vapor so formed should touch the side walls of bulb as soon as they are formed .

May be  the bulb of thermometer was   kept far from the vapors formed by liquid so,  s<u>ome of  the vapor before reaching to  bulb start condensing and their Temperature decreases </u>.  

Hence , the  temperature shown by thermometer was decrease than actual boiling point  due to incorrect position of thermometer.


4 0
3 years ago
A sample of a gaseous substance at 25 celcius and 0.862 atm has a density of 2.26 g/l. what is the molecular weight
faust18 [17]
Molecular weight = 2 * vapour density  at STP.
5 0
3 years ago
Which of these pumpkins has the most<br> thermal energy? Explain your answer.
VLD [36.1K]

Answer:

big

Explanation:

5 0
3 years ago
Determine % yield if a student obtains 45 g of product in an experiment and the theoretical amount is determined to be 50 g
Katen [24]
Percentage yield=(actual yield/theoretical yield) x 100%
= (45/50) x 100%
= 90%
8 0
3 years ago
Oceń prawdziwość podanych informacji w układzie okresowym pierwiastki chemiczne są złożone według NIK to jących się liczbą atomo
cluponka [151]
Wow. What language is this?
3 0
3 years ago
Other questions:
  • Uranium–232 has a half–life of 68.9 years. A sample from 206.7 years ago contains 1.40 g of uranium–232. How much uranium was or
    12·2 answers
  • A rock has a mass of 210 grams and occupies a volume of 70 cm3. What is its density?
    10·1 answer
  • How many atoms of phosphorus are in a 0.859 g sample?<br> Answer in units of atoms.
    10·1 answer
  • Calculate the number of C atoms in 0.183 mol of C.
    14·1 answer
  • 18. An example of an atom that has no
    12·2 answers
  • How does lowering Kinetic Energy affect the collision of particles?
    5·1 answer
  • How many times should you rinse a pipet before transferring liquid? 2- once with tap water and once with deionized water?
    9·1 answer
  • One of the governing laws of the universe is the thermodynamic law of entropy. Which choice best describes entropy?
    13·1 answer
  • A student wants to find the relationship between the diameter of several plastic disks and the circumference of each disk. Which
    11·1 answer
  • PREDICT How do you think the atoms in metal elements are different from those in
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!