Mark Brainliest please
Answer
Proteins
Cellulose
And Silk
Explaination
There are two types of polymers: synthetic and natural.
Synthetic polymers are derived from petroleum oil and made by scientists and engineers. Examples of synthetic polymers include nylon, polyethene, polyester, Teflon, and epoxy.
Polyvinyl chloride, commonly abbreviated PVC, is the third-most widely produced synthetic plastic polymer.
Natural polymers occur in nature and can be extracted. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins and rubber.
UV rays, gamma rays, and x rays
Hope this help
Answer:
It takes millions of years to form,
Compressing on the ocean floor.
Then one day they come to shore
and sediments they are no more.
They can sometimes tell of life before
with layers, fossils and much more! this is the rock formation
it's not a decoration .
Explanation:
Neutrons + protons = mass number of the atom
First we need to calculate the molar mass of
:
Na: 22.99g * 2 = 45.98g
Cr: 51.996g
O: 15.999g * 4 = 63.996g
Then add all of them together:
Now we know the molar mass of
is 161.97g.
We are given the amount of grams used in the solution. So let's find how many moles that were used:
We are asked to calculate the molarity, and we know the molarity formula is as follows:
We just calculated the number of moles that were used, and we are given the amount of solution (in mL, but we can convert 630 mL to 0.63 L by dividing by 1000 since there are 1000 mL in 1 L). So let's plug in the values to calculate for molarity:
So now we know that
the molarity of the solution is 0.12 M.