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asambeis [7]
3 years ago
15

Why didn't scientists know about atoms for a long time

Chemistry
1 answer:
fredd [130]3 years ago
6 0
They didnt have a powerfull enough microscope to see them an when they could they were moving to fast unless they were cold

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Consider the reaction: P(s) + 5/2 Cl2(g)PCl5(g) Write the equilibrium constant for this reaction in terms of the equilibrium con
Pani-rosa [81]

Answer: The equilibrium constant for the overall reaction is K_a\times K_b

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios.

a) P(s)+\frac{3}{2}Cl_2(g)\rightarrow PCl_3(g)

K_a=\frac{[PCl_3]}{[Cl_2]^{\frac{3}{2}}}

b) PCl_3(g)+Cl_2(g)\rightarrow PCl_5(g)

K_b=\frac{[PCl_5]}{[Cl_2]\times [PCl_3]}

For overall reaction on adding a and b we get c

c) P(s)+\frac{5}{2}Cl_2(g)\rightarrow PCl_5(g)

K_c=\frac{[PCl_5]}{[Cl_2]^\frac{5}{2}}

K_c=K_a\times K_b=\frac{[PCl_3]}{[Cl_2]^{\frac{3}{2}}}\times \frac{[PCl_5]}{[Cl_2]\times [PCl_3]}

The equilibrium constant for the overall reaction is K_a\times K_b

4 0
3 years ago
Which of the following is always true when a substance undergoes a physical change
MissTica
I believe it's letter C.
4 0
3 years ago
Golf ball has less mass than a tennis ball because it
spayn [35]

Answer:

B. Contains more matter

Explanation:

The answer is C because it makes sense to me and a golf ball does contain more matter than a tennis ball

Sorry if I'm wrong :(

6 0
3 years ago
Read 2 more answers
How did Thomson's discovery of neon's isotopes lead to the discovery of neutrons?
White raven [17]

Answer:

Neon consisted of atoms of two different masses but chemically alike. ... Movement of electrons between energy levels in atom must absurb just a certain amount energy to move to higher level can't hover between levels.

3 0
3 years ago
Which of the following is a strong electrolyte
Ilya [14]
A strong electrolyte is completely ionized. Ex: NaCl --h2o--> Na^+(aq) + Cl^-(aq)
6 0
3 years ago
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