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Nat2105 [25]
3 years ago
11

Why is it important to use significant figures in chemistry?

Chemistry
1 answer:
TEA [102]3 years ago
3 0
It is important because it helps with accuracy and precision of numbers. Also say you have an equation, you want to have an equal amount of significant figures to be accurate.
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How do you express homogeneous reactions in the Keq formula? How is that different than how you express heterogeneous reactions?
ehidna [41]
Consider the following homogenous reaction:
aA + bB ⇔ cC + dD

The equilibrium constant is written as:
Kc = ([C]^c * [D]^d) / ([A]^a * [B]^b)
Therefore the equilibrium constant is the ratio of the concentration of the products to concentration of the reactants at equilibrium.

For a heterogenous reaction, the species that are not in the same physical state as the rest of the chemical species are omitted from the expression. Considering the previous reaction, if reactant A was solid and the remaining were gaseous, the expression will be:
Kc = ([C]^c * [D]^d) / [B]^b
8 0
3 years ago
The primitive atmosphere of Earth may have favored the abiotic synthesis of organic molecules because it __________.
ASHA 777 [7]

Answer and Explanation:

The primitive atmosphere of Earth may have favored the abiotic synthesis of organic molecules because it **had close to no oxygen, hence, it was powerfully reducing. It had pure energy sources too in form of ultraviolet rays from the sun (it was extremely hot! Too hot for water in liquid form to exist in fact!), outgassing from the numerous volcanoes and lightning**.

Abiotic synthesis means a formation reaction where the reactants are charged to become products, almost all on their own, with no catalyst especially.

So, these factors would have helped the organic molecules to form as most of what is needed to overcome the energy barrier and become products.

7 0
4 years ago
222 Fr<br> Beta decay of 87<br> I
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4 0
3 years ago
Which state of matter contains atoms that are completely ionized?
NISA [10]
This is actually known as the fourth state of matter which is the<em> plasma</em>. The plasma is basically a hot ionized gas. It consists of equal number of protons and electrons. This can be obtained by subjecting a gas to a high energy, for example, a laser beam. The energy from the laser beam causes a rapid energy increase of the atoms, such that they become ionized.
8 0
3 years ago
For H3PO4, Ka1 = 7.3 x 10^-3, Ka2 = 6.2 x 10^-6, and Ka3 = 4.8 x 10^-13. A 0.10 M aqueous solution of Na3PO4 therefore would be
zmey [24]

Answer:

The aqueous solution of Na_{3} Po_{4} therefore would be "strongly basic."

Explanation:

Strongly basic because the Na_{3} Po_{4} is completely an ionic compound. These compound can be 100% splitted into metal ions and hydroxide ion when used in the aqueous solution. Each moles dissolves which can give rise to mole of hydrogen ions when used in the solution. Whereas strong bases are not soluble in water as well.  in the presence of water equilibrium can also be achieved. A strong base has the capability which can just remove the proton from the molecule.

3 0
3 years ago
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