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
Mrrafil [7]
3 years ago
8

Which process is an example of a chemical change? drying clothes in the dryer heating a cup of tea chopping a tree activating a

glow stick
Chemistry
1 answer:
coldgirl [10]3 years ago
8 0
Answer:

Activating a glow stick is the example of a chemical change, as snapping one will cause a chemical reaction, causing the glow. All of the other options are physical changes because nothing new is formed. Hope this helps!
You might be interested in
What is the date of discovery of element Mercury
STALIN [3.7K]

2000 BC and was found in tubes in Egyptian tombs dated from 1500BC

hope this helps

4 0
3 years ago
Read 2 more answers
For the following reaction, 35.4 grams of zinc oxide are allowed to react with 6.96 grams of water . zinc oxide(s) + water(l) --
IRISSAK [1]

Answer:

m_{Zn(OH)_2}=38.4g

Explanation:

Hello!

In this case, for the undergoing chemical reaction:

ZnO(s)+H_2O(l)\rightarrow Zn(OH)_2

We evaluate the yielded moles of zinc hydroxide by each reactant as shown below:

n_{Zn(OH)_2}^{by ZnO}=35.4gZnO*\frac{1molZnO}{81.38gZnO}*\frac{1molZn(OH)_2}{1molZnO}  =0.435molZn(OH)_2\\\\n_{Zn(OH)_2}^{by H_2O}=6.96gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{1molZn(OH)_2}{1molH_2O}  =0.386molZn(OH)_2

In such a way, since the water yields a smaller amount of zinc hydroxide we conclude it is the limiting reactant so the maximum mass is computed below:

m_{Zn(OH)_2}=0.386molZn(OH)_2*\frac{99.424 gZn(OH)_2}{1molZn(OH)_2} \\\\m_{Zn(OH)_2}=38.4g

Because the water limits the yielded amount of zinc hydroxide.

Best regards!

5 0
3 years ago
What is the standard state of oxygen?
Simora [160]
O2 gas, where there are two Oxygen atoms which are covalently bonded together
4 0
3 years ago
Read 2 more answers
Which plate, oceanic or continental, must be more dense?
musickatia [10]

Answer:

Oceanic & Continental Plates

The oceanic plate is denser and sinks due to its lower buoyancy. It's sucked into the asthenosphere and is melted deeper into the Earth, called a subduction zone. The continental plate is less dense and floats over the top of it since it is more buoyant

4 0
3 years ago
What is the democritus findings?
Volgvan

nvm

nvm

nvm

nvm

nvm

nvm

nvm

4 0
3 years ago
Other questions:
  • NEED HELP ASAP
    13·1 answer
  • Chemical Formula for Coffee?
    11·1 answer
  • Charles's law is an experimental gas law that shows the relationship between the temperature of a gas and its corresponding volu
    13·1 answer
  • Compare the solubility of a fatty acid and a fatty acid salt in water. Compare the solubility of a fatty acid and a fatty acid s
    6·1 answer
  • What type of reaction happens in a nuclear power plant?
    5·1 answer
  • A sample of the sugar d-ribose (C5H10O5) of mass 0.727 g was placed in a calorimeter and then ignited in the presence of excess
    11·1 answer
  • If the density is 0.1 g/cm^3 and the volume is 5cm^3, what is the mass?
    7·1 answer
  • 65 grams of calcium equal how many moles?
    8·1 answer
  • 115 grams of solid aluminum perchlorate are dissolved in 504 ml of water at 20°C. Calculate the concentration of aluminum perchl
    15·1 answer
  • 73 gram of HCl was filluted by adding 144gram of water.how many gram atom of hydrogen are present in the dilute acid?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!