3 years ago

5 points What do you think photosynthesis means ?

Chemistry

1 answer:

Helga [31]3 years ago

7 0

The process of turning photons (sunlight) and carbon dioxide Co^2 and water H^2O into glucose (sugar)

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CH3CH3Li ionic or covalent

vampirchik [111]

Answer: CH3CH3Li is in fact Ionic!

Explanation:

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Question 4 what is the term for a group of atoms held together by covalent bonds that bears an overall negative or positive char

erma4kov [3.2K]

Should be a polyatomic ion

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3 years ago

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Levart [38]

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What is the energy of a moving mass?

satela [25.4K]

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Typical "hard" water contains about 2.0 x 10–3 mol of Ca2+ per liter. Calculate the maximum concentration of fluoride ion that c

malfutka [58]

Answer:

$[F^-]_{max}=4x10{-3}\frac{molF^-}{L}$

Explanation:

Hello,

In this case, for the described situation, we infer that calcium reacts with fluoride ions to yield insoluble calcium fluoride as shown below:

$Ca^{+2}(aq)+2F^-(aq)\rightleftharpoons CaF_2(s)$

Which is typically an equilibrium reaction, since calcium fluoride is able to come back to the ions. In such a way, since the maximum amount is computed via stoichiometry, we can see a 1:2 mole ratio between the ions, therefore, the required maximum amount of fluoride ions in the "hard" water (assuming no other ions) turns out:

$[F^-]_{max}=2.0x10^{-3}\frac{molCa^{2+}}{L}*\frac{2molF^-}{1molCa^{2+}} \\$

$[F^-]_{max}=4x10{-3}\frac{molF^-}{L}$

Best regards.

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3 years ago