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andrew11 [14]
3 years ago
15

Calculate the mass of dry ice that should be added to the water so that the dry ice completely sublimes away when the water reac

hes 16 ∘c. assume no heat loss to the surroundings.

Chemistry
1 answer:
riadik2000 [5.3K]3 years ago
8 0
There are a lot of missing information in this problem. I've found a similar problem which is shown in the attached picture. Let's just use the information there that we don't have here.

From the principle of conservation of energy:

Heat of dry ice + Heat of water = 0
Heat of dry ice = - Heat of water
(m of dry ice)ΔH = -(m of water)(Cp)(ΔT)
where Cp for water is 4.187 kJ/kg·°C

Hence,
(m of dry ice)(ΔH°g - ΔH°s) = -(Density*Volume)(Cp)(ΔT)
where the density of water is 1 kg/L and the molar mass of dry ice is 44 g/mol.

Then,
(m of dry ice)(-393.5 - -427.4 kJ/mol)(44 g/mol) = -(1 kg/L*12L)(4.187 kJ/kg·°C)(16 - 88 °C)
Solving for m of dry ice,
<em>Mass = 2.43 g of dry ice</em>

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Determine the frequency of light with a wavelength of 2.775⋅10−7 cm. Answer in units of Hz?❤

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Each neutral carbon atom contains four valence electrons and may form up to four electron domains. Possible hybridizations include

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Molecules of each of the three hybridization demonstrate spatial configurations that would maximizes the separation between the electron domains.

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Bond angles are characteristic of the spatial configuration of electron domains and identifies the hybridization of the central carbon atom.

Note that each hydrogen atom contains only one valence electron and would form only single bonds. It takes two valence electrons for oxygen atoms to achieve an octet such that each oxygen form only two bonds at a single time. Therefore given the fact that the carbon is bonded to both hydrogen and oxygen, only the following hybridizations are possible

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3 years ago
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