Hey there! :D
Which of the following is a chemical change?
A <em>chemical change </em>is a change that alters the makeup of a substance or something. It changes what it is made of. You cannot alter chemical changes.
Boiling water can go back to regular room temperature water. This is not a chemical change.
Melting a cube of ice is not a chemical change. We can freeze the water again to make it ice.
Dissolving 10 grams of salt in water is not a chemical change. You can boil the water and split the salt and water. People do this with Ocean water, to make it drinkable.
Splitting water into hydrogen and oxygen is a chemical change. You change the makeup of the water. It is now separate hydrogen and oxygen. It is not water anymore. "D" is the answer.
I hope this helps!
~kaikers
<span>The liquid helium absorbs energy from the air in the room.
as the particles gane some energy and start some motion</span>
Answer:
40:1 is the ratio of the magenta phenolphthalein concentration to the colorless phenolphthalein concentration.
Explanation:
To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:
We are given:
= negative logarithm of acid dissociation constant of phenolphthalein = 9.40
= concentration of magenta phenolphthalein
= concentration of colorless phenolphthalein
pH = 11
Putting values in above equation, we get:
40:1 is the ratio of the magenta phenolphthalein concentration to the colorless phenolphthalein concentration.
Answer: The suffixes of the names of polyatomic ions have a pattern associated with them. ... For example, the sulfite ion has three oxygen atoms whereas the sulfate ion has four oxygen atoms.
Reduce the burning of fossil fuels by using electrical vehicles and instruments is the only solution to stop climate change.
<h3>
How climate change can be stopped?</h3>
Climate change is a process which occurs due to the release of greenhouse gases such as methane and carbondioxide gases. When fossil fuel is burn, it releases energy along with carbondioxide gas which blocks the escape of solar radiation.
This blockage leads to the warming of surface temperature. So if we switched to electrical vehicles instead of conventional vehicles, this climate change can be stopped.
So we can conclude that reduce the burning of fossil fuels by using electrical vehicles and instruments is the only solution to stop climate change.
Learn more about climate here: brainly.com/question/17922964
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