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Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction?13, 8th grade, and I'm doing my science lab report: The lab was a chemistry lab. We got a bunch of toxic chemicals and put pairs of them together, recorded the reactions, and wrote balanced equations for each of them and identified what kind of reaction they were. The whole name of the lab is "Evidence of Chemical Reactions", and one of the first analysis questions is "write a paragraph about the kinds of changes you would expect to see if a chemical reaction occurs." I answered this with things like bubble formation, change of color, change of state of matter, etc. Then the next question said "any one of these signs is not always a fool proof indication that a chemical reaction is occurring. give two examples to support this statement." what are two examples to support the statement that the commonly known examples of chemical reactions occurring are not always foolproof evidence that chemical reactions are occurring?
source: college science teacher
Alex built a snowman using three snowballs,one small, one medium and one large, with diameters in the ratio 2:3:5. Although highly unlikely due to the physical properties of snow, suppose the three snowballs were perfectly spherical and stacked vertically, one on top of the other, as shown, with adjacent snowballs sharing a single point of tangency. If the diameter of the medium snowball was 18 inches, what was the maximum height, in feet, of the snowman Alex built using the three snowballs?
So, we can apply this property of log
A single nucleotide is composed of phosphoric acid, deoxyribose and a nitrogenous base (adenine, guanine, thymine or cytosine).
now, the interception of Y happens when the X is equal 0, then...
so in this case:
and taht is:
Hope it helps you! :)
If he says his fame goes up to heavens this means he acknowledges the gods (Greek Mythology):)
we can make this...
I'm sure about my answer, don't matter the order...
2. improving certain species (like growing bigger apples)
I hope I helped
-0.4 + 10m = 9.6
-0.4 + 10m = 9.6
Solving for 'm'Move all terms containing m to the left, all other terms to the right.
-0.4 + 0.4 + 10m = 9.6 + 0.4
Combine like terms: -0.4 + 0.4 = 0.00.0 + 10m = 9.6 + 0.410m = 9.6 + 0.4
Combine like terms: 9.6 + 0.4 = 1010m = 10
Divide each side by '10'.m = 1
The prime factors of these two numbres are :
The GCF can be calculated by multiplying common primes factors :
So the GCF is 5b and the expression can be factored this way :
covalent bonding is when electrons are shared between two elements.
molecular polarity is a little bit complicated, but I will try to explain ;)
PCl3 is an alternation on tetrahedral molecules.
It means that P has one lone pair of electrons. This pair of electrons are only attracted to the P nuclei and thus a greater freedom of motion.
This means that their orbital is bigger and this pushes the 3 Cl atoms closer together.
The angle between each Cl now is 107 and the angle between Cls and P is greater than 107.
Now, due to this shape, and also electronegativity (Cl is more electronegative than P meaning that it tends to hog the electrons they share closer to itself), PCl3 is polar. Electrons that are shared tend to flow closer towards the Cl than the P side.
Therefore, on the Cl side of the molecule it's, more negative. On the P side, it's more positive.