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3 years ago

Classify each of the following chemical reaction (check all that apply) :

Chemistry

1 answer:

harkovskaia [24]3 years ago

8 0

Answer:

(1 ) acid-base, double replacement

(2) double replacement

(3) combustion, combination

(4) double replacement, precipitation

Explanation:

(1) Recognize this as the reaction of the acid (HI) with the base (NaOH) to produce salt (NaCl) and water.

This reaction is also a double replacement since Na replaces H in HI,and H replaces Na in NaOH.

(2) Here we have a double replacement where Cu replaces Zn in ZnCrO4, and Zn replaces Cu in CuSO4

(3) Here we have the combustion of the organic compound CH3CH2OH (ethanol) with oxygen to produce CO2 and water.

This reaction is also a combination reaction reaction of oxygen with CH3CH2OH

(4) This reaction is also a double replacement where Ag replaces Na in NaCl and Na replaces Ag in AgNO3

The reaction is also a precipitation reaction where a precipitate AgCl is formed from the reaction of aqueous NaCl plus AgNO3 to produce solid AgCl and aqueous NaNO3.

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Choose the word that best completes this sentence. Welding in confined spaces or on stainless steel generates _____________ a ve

Drupady [299]

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3 years ago

Read 2 more answers

write a sentence about the evidence for plate tectonics yielded from earthquakes,valcanoes, and age of sea floor.

gulaghasi [49]

Answer:

Fossils, Glaciers, Coastlines.

Explanation:

Evidence of plate tectonic theory are fossils, fossils of the same species were found oceans apart. also glaciers evidence of glaciers were found in places with warm climates. coastlines coastlines look like they fit in a puzzle.

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3 years ago

What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?

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4 clumping beauty and Gove the other

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4 years ago

Hydrochloric acid reacts with sodium hydroxide to produce sodium chloride and water. If 20.6 g of sodium hydroxide reacts with a

astraxan [27]

Answer:

30.1 g NaCl

Explanation:

Your first conversion is converting grams NaOH to moles of NaOH using its molar mass (39.997 g/mol). Then, use the mole ratio of 1 mol NaCl for every 1 mol NaOH to get to moles of NaCl. Then finally multiply by the molar mass of NaCl (58.44 g/mol) to get grams of NaCl.

20.6 g NaOH • (1 mol NaOH / 39.997 g NaOH) • (1 mol NaCl / 1 mol NaOH) • (58.44 g NaCl / 1 mol NaCl) = 30.1 g NaCl

4 0

3 years ago

A certain chemical contains 46.30% chlorine, 47.05% carbon, 6.63% hydrogen. What is the molecular formula of the compound? The m

RoseWind [281]

Answer:

C6H10Cl2

Explanation:

Convert mass % to mass

100g of the compound contains from each elements: 46,3g Cl; 47,05g C and 6,63g H

Molar mass

Cl = 35.5 g/mol

C = 12 g/mol

H = 1 g/mol

Find the number of moles:

Chlorine: 46.4g /35.5g/mol = 1,3 moles

Carbon: 47,05g/12 g/mol = 3,92 moles

hydrogen: 6,63g/1g/mol = 6,63 moles

Molar fraction:

Cl = 1,30/ 1,30 = 1

C = 3,92/ 1,30 = 3,01

H = 6,63/ 1.30 = 5,01

C3H5Cl = 76,5 g/ mol x 2 = 153 g/ mol

So multiply the molecular formula by two = C6H10Cl2

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3 years ago