For 6.44 x 10^23 atoms:
That amount is 1.07 moles of Cl atoms
multiply the number of moles by the molar mass of Cl which is 35.45
That equals 37.9 grams of Cl. You only use 1 decimal place because there are only 3 significant digits.
Now if it is a text book problem that says chlorine gas, it may be referring to atmospheric Cl gas which is Cl2
In that case, its just 1.07 moles x 70.9 (molar mass of Cl2)
That turns out to be 75.9 g Cl2
1.List one extensive and one intensive property of marker ink.
Intensive property is a property that is independent of the amount of sample such as the color of the ink. Extensive property is the opposite which is dependent to the amount such as volume.
2.Define mixture.
Mixture is a system that contains two or more substances which are agitated but not chemically bonded.
3.Is tap water a heterogeneous or homogenous mixture?
Tap water is a homogenoeus mixture because it has uniform properties in every sample you get.
4.Is isopropyl alcohol (rubbing alcohol) a heterogeneous or homogenous mixture?
I think the rubbing alcohol is a homogeneous mixture since it has uniform properties as well.
Answer:
#1 You get valid data for one.
#2 Not measuring accurately can have some bad consequences.
#3 If you mix the wrong amount of chemicals you can end up getting yourself or worse other people hurt.
#4 When making food you need to measure the amount of sugar or salt you put into the dish or else your face will be this
Before I get to the answer, I would recommend that you post biology questions under the biology category. You should get your answers more quickly that way :)
There are two things that happen before a parent cell divides:
1) DNA in the nucleus of the parent cell must replicate (this happens in the S phase of the cell cycle). If you're looking for a single answer to your question, then this is probably it.
2) Also, the cell must grow and some organelles (like the mitochondria) must also replicate before the parent cell divides. If organelles like the mitochondria did not replicate, then you would eventually end up with daughter cells that don't have enough mitochondria to support themselves.