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What is the hardest natural substance know to man?

You only have 20 amino acids to chose from and thousands of proteins to make.

Don't you think the Golgi is too far down the endomembrane system for making proteins?
Even biology can be logically approached.

Are they changed in a reaction?

Try differentiation here.

A quick Google of the alkaline earth metals will give you your answer.

O^2
That is a free radical. A anion.
H2O
One result of these electron hogs interacting with other elements. Not always this innocuous.

This is year two algebra?!
This simple arithmetic problem can be solved with the converse of the percentages given. Simple division.

Distance = Rate * Time
Or, for our purposes,
Rate = Distance/Time
From the rate, m/s, you should be able to figure out the ' beats by. '

Regardless, the warning stands.

Phosphine gas is highly toxic and flammable. Untreated phosphine gas is also orderless.
Do not synthesize this gas!

CuO + H2 > Cu + H2O
Simple stoichiometry here as all is one to one. Find moles of reactants, the H2 should be limiting ( but checkfound moles less than coefficient moles, but H2 really...

Because they are both disassociated in solution.
K^+ ( the cation on both sides of the equation )
and
NO3^ ( the polyatomic anion on both sides of the equation )
In solution these ions...


The usual 5% significance level.
More detail from you needed here

(6c 5) + (6c)
Now, spaced properly I see that you just add the two terms together. Only one term will remain then.
No multiplication here and this is a simple set of terms just needing to be...


Not a real equation but an identity.
Use your identities on the inside of the text cover and follow the other answer that was given.

Molarity = moles of substance/Liters of solution ( convert mL to L )
If you have moles you can get mass.

Could use a chi square hypothesis test.
X^2 = sigma(total of) {observed frequency  expected frequency)^2/expected frequency]
Less that 5% and through out the hypothesis.

Obviously she is pregnant, so fertility dates were miscalculated most likely.
The " rhythm " method is very inaccurate. Pulling out is not much better. Try a better means of birth control

Solving Algebraic Equations 6x7y=13 and 7x+5y=2
A system of equations.
6X  7Y =  13
7X + 5Y =  2
Elimination would work best here. So you would bring the set to opposite but equal...

PV = nRT
Pressure * Volume = moles of substance * R ( a constant ) * temperature in Kelvin
This is a fairly simple ideal gas equation problem.

Lysosomes are full of these enzymes and they merge with their target.

Organosilicon compounds are usually absent in biochemical processes. The non carbon analogue, I think.
I do not understand from your question if organosilcons are analogous, or not analogous in...

Simple equality.
M1V1 = M2V2

f(x)=x^2 if x<0
f( 2)
Just plug and chug.  2 is < 0, so..
f(x) = X^2
f( 2) = ( 2)^2

The biomass. All organic matter. Living and nonliving.
A simple carbon cycle.
Plants take carbon dioxide from the air, fix it into sugars and use it to build plant matter. ( some carbon dioxide...

Actually, they are inverted to keep the covers from fogging and facilitating the growth of fungi. Also to keep that moister from dripping back into the culture.

That appears to be it.
There are no further common factors that I can see.
2(4X^2  25)
============This appears to be the fully factored expression. ( especially at the HS level )

Not sure what you want but helium is an inert gas and carbon dioxide is anything but inert.

You should know this is a tetrahedral structure and the VESPER theory is well explained in your chem book
5.
VSEPR theory explains ______.
This should be obvious as we live in a three...

Not possible.
Blood group O is recessive ( Rh factors, +/, mean nothing here )
If both parents are O this thin is the only cross as a recessive expression must be homozygous.
OO X OO...

1. What are the molecular shapes of?
Methane (CH4)
This is a tetrahedral structure and this structure is in your book along with all the other VESPER theory structures. ...

Review the distributive property.

The seasons.
Google for fuller answer.

P1*V1/T1 = P2*V2/T2
You have 5 things and you need to find the 6th.
Might have to do some conversions.
Pressure = atmospheres
Volume = liters

1 mole gas/4 stops = 0.25 moles
Convert Fahrenheit to Kelvin by going through the Fahrenheit to Celsius conversions and use the 62.36 L*torr/mol*K ( torr = mm Hg directly)
Then, PV...

6.022 X 10^23
A helpful number in your situation.
No homework is done here without some work being shown so that help can be given. Show a set up.

They sell kits that tell you very easily whether you are pregnant or not.
From this perspective, behind my keyboard, I could not tell you but it sounds as if your menses is acting particularly...

Substances tend to flow down their concentration gradients.

With a true and false question you know they ALL can't be in the nucleus

This is very simple.
What is your density formula? Plug and chug.

2NaF + H2O > 2HF + Na2O

This would be the ideal balanced equation that would yield hydrofluoric acid, but I said ideal, so I think you are right and...

Looks cut off to me, but..
This formula seems right.
q(in joules) = mass * specific heat of that mystery gas * change in temperature

X = Vo*t + 1/2a*t^2
A equation of kinematics you may find useful.

Hydrogen is..
1.008 grams/mole
That is 1.008 grams is 6.022 X 10^23 atoms of hydrogen.
So, 1 atom of hydrogen..
1 atom H/6.022 X 10^23 atoms

Both in the strong nuclear force holding protons and neutrons together and the weak nuclear force that is there in electron interactions between elements.

Nitrogen fertilizer is used in bombs, not phosphorous fertilizer.
You people are right about one thing, chemistry is not your profession. Chemistry is not a trade!
This is homework and not...
