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What condition would have made the primitive atmosphere of Earth more conductive to the origin of life than?
In the primitive atmosphere, free oxygen was absent. It facilitated the formation of simple organic chemical compounds without loss from oxidstion. Finally, the polymers, essential for primitve life were formed...
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Rebecca has samples of different types of metal. She wants to measure the samples to find out the density of each metal. First, she measures the samples' volumes. Now she needs masses. What tools should Rebecca use to measure her samples' masses?
$"Density,"$ $rho="Mass"/"Volume"$, and thus it has the units of $g*mL$ or $g*cm^-3$.
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Boron is one position to the left of carbon on the periodic table. The atomic nurnber of carbon is 6. Given its position on the periodic table, what is the atomic number of boron?
The 100 or so are characterized by $Z_"atomic number"$...which specifies the number of charged particles present in the element's nucleus. $"Z=1, hydrogen; Z=2, helium"$ $"Z=3, lithium; Z=4, beryllium; Z=5, boron;...
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Why are metals malleable, and ductile, and conductive of heat and electricity?
$"Metallic bonding"$ results from the close packing of metal atoms, such that the atoms contribute a few of their to the overall lattice. These are delocalized, and not associated with...
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Does electronegativity increase or decrease when you go a period on the periodic table? Does it increase or decrease when you move down a group on the periodic table?
As we face , increases ACROSS the Period from LEFT to RIGHT, BUT DECREASES down a Group, a column of the the Periodic Table. So why? Well, we will first...
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What are metallic compounds and why are they conductive?
The reason as to why metallic posses these properties is because the electrons do not stay in their assigned orbitals, they become delocalised and move all over the place....
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Why are covalent compounds not conductive?
In order to have a electrical conductivity, you must have free flowing electrons or a "sea of electrons", however, covalent bonds does not have it as it is the sharing...
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Why is ionic solid non-conductive, yet its solutions in water, or in the liquid state, it carries a charge?
Take a simple salt such as $NaCl$. We might represent this as $Na^+Cl^-$. Now in the solid state, each cation ($Na^+$) is directly bound to 6 anions ($Cl^-$), and vice...
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Why is an ionic solid non-conductive, but conductive in aqueous solution?
The generic ionic solid is $MX$, and consists of equal number of $M^+$ and $X^-$ ions that are held together in a non-molecular, electrostatically bound lattice. The ions are not...
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Lisa wants to make an acid. She has two possible compounds she could add to 250.0 g of water to
make this acid – EITHER 234.5 g of calcium oxide OR 678.9 g of tetraphosphorus decaoxide (she won’t use both, just one).?
a. Which compound should s
So, you know that Lisa must mix either calcoium oxide, $"CaO"$, or phosphorus pentoxide, $"P"_4"O"_10$, with water in order to produce an acid. SIDE NOTE Phosphorus pentoxide is just...
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