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kicyunya [14]
3 years ago
8

Which of the following demonstrates a double-replacement reaction?

Chemistry
2 answers:
Korolek [52]3 years ago
8 0

<u>Answer:</u> The correct answer is Option A.

<u>Explanation:</u>

For the given options:

<u>Option A:</u>  Na_3PO_4+MnCl_2\rightarrow Mn_3(PO_4)_2+NaCl

This reaction is considered as a double displacement reaction because here exchange of ions takes place.

<u>Option B:</u>  CaCO_3\rightarrow CaO+CO_2

This reaction is considered as a decomposition reaction because here one substance is breaking into two smaller substances.

<u>Option C:</u>  2Mg+O_2\rightarrow 2MgO

This reaction is considered as a synthesis reaction because here two smaller substances are combining in their elemental state to form a single large substance.

<u>Option D:</u>  2AgNO_3+Cu\rightarrow 2Ag+Cu(NO_3)_2

This reaction is considered as a single displacement reaction because here more reactive element displaces a less reactive element from its chemical reaction.

Hence, the correct answer is Option A.

Volgvan3 years ago
6 0
A: Na3PO4 + MnCl2 > Mn3(PO4)2 + NaCl
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A when sulfuric acid is added to sirie, hydrager
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Sulfuric acid is prepared industrially by means of the response of water with sulfur trioxide which in turn is made by way of a chemical combination of sulfur dioxide and oxygen both by way of the touch system or the chamber system.

                         H2SO4 (l) H2O (g) + SO3 (g).

The reaction is highly exothermic as an enormous amount of heat is liberated.

The usual approach is to dilute the sulfur trioxide in sulphuric acid. This produces oleum. SO3 (g) + H2SO4 → H2S2O7 (1) Oleum can be in addition diluted in water to acquire concentrated sulphuric acid.

An acid catalyst is added to protonate the carbonyl carbon. How does this catalyze the response, robust acid catalysts catalyze the hydrolysis and transesterification of esters which enables the mechanism with a view to boom the electrophilicity of the carbonyl carbon to assist protonate the carbonyl oxygen.

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8 0
2 years ago
Which of the following represent chemical processes? Which represent physical processes?
Viktor [21]

Answer:

A). Calcium chloride dihydrate (CaCl2 * 2H2O) slowly heated in a crucible to become calcium chloride (anhydrous).

Dehyration is a physical process

B). A hydrocarbon such as propane (C3H8) undergoes combustion to power a grill

Combustion is a chemical process.

C). A rock climber’s rope becomes frayed and turns the color of the rocks

This is physical process

D). A dog urinates on an air conditioner coil and the coil becomes corroded

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Explanation:

7 0
2 years ago
How is an average mass different from a weighted mass
romanna [79]

In an average mass, each entry has equal weight. In a weighted average, we multiply each entry by a number representing its relative importance.

Assume that your class consists of 15 girls and 5 boys. Each girl has a mass of 54 kg, and each boy has a mass of 62 kg.

<em>Average mass</em> = (girl + boy)/2 = (54 kg + 62 kg)/2 = <em>58 kg</em>

<em>Weighted average (Method 1) </em>

Use the <em>numbers of each</em> gender (15 girls + 5 boys) ,

Weighted average = (15×54 kg + 5×62 kg)/20 = (810 kg + 310 kg)/20

= 1120 kg/20 = <em>56 kg</em>.

If you put all the students on one giant balance, their total mass would be

1120 kg and the average mass of a student would be <em>56 kg. </em>

<em>Weighted average (Method 2) </em>

Use the <em>relative percentages</em> of each gender (75 % girls and 25 % boys).

Weighted average = 0.75×54 kg + 0.25×62 kg = 40.5 kg + 15.5 kg = <em>56 kg</em>

Each girl contributes 40.5 kg and each boy contributes 15.5 kg to the <em>weighted average</em> mass of a student.

6 0
3 years ago
Someone plz help i will mark brainliest
zimovet [89]

Answer: NH3

Explanation:

5 0
2 years ago
Read 2 more answers
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