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Anastasy [175]
2 years ago
5

The acid from burning coal is rained back down onto the planet surface and reacts with

Chemistry
1 answer:
jeka942 years ago
4 0
What? Why does it have a question mark it makes no sense because there isn’t any options and you didn’t explain what the question is about.
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Determine the freezing point of an aqueous solution containing 10.50 g of magnesium bromide in 200.0 g of water.
Rudiy27
For an aqueous solution of MgBr2, a freezing point depression occurs due to the rules of colligative properties. Since MgBr2 is an ionic compound, it acts a strong electrolyte; thus, dissociating completely in an aqueous solution. For the equation:

                                ΔTf<span> = (K</span>f)(<span>m)(i)
</span>where: 
ΔTf = change in freezing point = (Ti - Tf)
Ti = freezing point of pure water = 0 celsius
Tf = freezing point of water with solute = ?
Kf = freezing point depression constant = 1.86 celsius-kg/mole (for water)
m = molality of solution (mol solute/kg solvent) = ?
i = ions in solution = 3

Computing for molality:
Molar mass of MgBr2 = 184.113 g/mol

m = 10.5g MgBr2 / 184.113/ 0.2 kg water = 0.285 mol/kg


For the problem, 
ΔTf = (Kf)(m)(i) = 1.86(0.285)(3) = 1.59 = Ti - Tf = 0 - Tf

Tf = -1.59 celsius
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To arrive at the number of hydrogen atoms, What can be said about the relationship between the number of hydrogen atoms and the
Semenov [28]

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nothing shsheysyeggehssl

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A catalyst
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A catalyst speeds up the rate of reaction so the answer is B.
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Iteru [2.4K]

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Genetically modified foods, also known as genetically engineered foods, or bioengineered foods are foods produced from organisms that have had changes introduced into their DNA using the methods of genetic engineering

Explanation:

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A

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