3 years ago

What do butterflies and lobsters have in common?

1 answer:

3 0

Answer:

They all wear their skeletons on the outside! This is called an exoskeleton and all creatures that have their structure on the outside are included in the phylum of Arthropods.

Explanation:

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Let us write the appropriate equilibria and associate the correction <img src="https://tex.z-dn.net/?f=K_b" id="TexFormula1" tit

rosijanka [135]

Explanation:

The relation between $K_a\&K_b$ is given by :

$K_w=K_a\times K_b$

Where :

$K_w=1\times 10^{-14}$ = Ionic prodcut of water

The value of the first ionization constant of sodium sulfite = $K_{a1}=1.4\times 10^{-2}$

The value of $K_{b1}$ :

$1\times 10^{-14}=1.4\times 10^{-2}\times K_{b1}$

$K_{b1}=\frac{1\times 10^{-14}}{1.4\times 10^{-2}}=7.1\times 10^{-13}$

The value of the second ionization constant of sodium sulfite = $K_{a2}=6.3\times 10^{-8}$

The value of $K_{b2}$ :

$1\times 10^{-14}=6.3\times 10^{-8}\times K_{b1}$

$K_{b1}=\frac{1\times 10^{-14}}{6.3\times 10^{-8}}=1.6\times 10^{-7}$

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3 years ago

How is a lithium atom (Li) different from a lithium ion (Li+)?

sdas [7]

Li has fewer electrons than Li+ (protons can't change)

8 0

2 years ago

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In calorimetry, energy is measured through heat transfer from one substance to

Brilliant_brown [7]

I think you forgot to add a picture?

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3 years ago

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What is the value for ∆Soreaction for the following reaction, given the standard entropy values?

Vesnalui [34]

The standard entropy for the substances are as follows:

C6H12O2(s) = -212
O2(g) = -205 
CO2(g) = -214 
H2O(l) = -70

We calculate the ∆S°reaction by the expression:

∆S°rxn = ∆S°products - ∆S° reactants
∆S°rxn = (212+6x205)-(6x214+6x70)
∆S°rxn = -262 J/K ------> OPTION 3

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2 years ago

Which of these is not a feature of the Earth's lithosphere?

makkiz [27]

The answer I’m pretty sure is c) the upper mantle

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2 years ago

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