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3 years ago

Why do reactions need to be balanced?

Chemistry

1 answer:

nexus9112 [7]3 years ago

5 0

Answer:

A part.

Explanation:

Because the reactants must be the exact same as the the products.

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From observing the plant and animal cell diagrams above, which cell seemed to have more of a regular structure?

Tasya [4]

Answer:

the green one

Explanation:

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3 years ago

Verdadero o falso.

marusya05 [52]

Answer:

True

Ammonia reacts as a nucleophile with alkyl halides to give primary amines in a nucleophilic substitution reaction. Yields are often poor as the product, a primary amine, RNH2, is itself a nucleophile and can react with more alkyl

A nitrile is a compound that contains a –CN (cyano) functional group with a carbon-nitrogen triple bond. The simplest organic nitrile is CH3–CN and is called acetonitrile, which is a good solvent for organic reactions. ... Structurally diverse nitrile-containing compounds are present in many medicinal drugs.

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3 years ago

Read 2 more answers

Barium (Ba) is an alkaline earth metal. t or f

tatiyna

Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. Thanks and I hope it helped.

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4 years ago

When 4.21 grams of potassium hydroxide are added to 250 mL of water in a coffee cup calorimeter, the temperature rises by 4.14°C

Schach [20]

Answer:

The molar heat of solution of potassium hydroxide = 57.7 kJ /mol

Explanation:

Step 1: Data given

Mass of potassium hydroxide = 4.21 grams

Volume of water = 250 mL

Temperature rise = 4.14 °C

Density = 1g/mL

Specific heat = 4.184 J/g°C

Step 2: Calculate the heat absorbed by water

q = m*c*ΔT

⇒ with m = the mass of water = 250 grams

⇒ with c= the specific heat of the solution = 4.184 J/g°C

⇒ with ΔT = 4.14 °C

q = 250 * 4.184*4.14 = 4330.4 J

Step 3: Calculate moles of KOH

Moles KOH = Mass KOH / Molar mass KOH

Moles KOH = 4.21 grams / 56.106 g/mol

Moles KOH = 0.075 moles

Step 4: Calculate molar heat of solution

4330.4 J / 0.075 moles = 57738.7 j/mol = 57.7 kJ /mol

(Note that the enthalpy change for the reaction is negative because the reaction is exothermic)

The molar heat of solution of potassium hydroxide = 57.7 kJ /mol

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4 years ago

The reaction of 2-methylcyclohexanone with CH3MgBr followed by neutralization gives two alcohols. These two alcohols are

Lilit [14]

The reaction of 2-methylcyclohexanone with CH3MgBr followed by neutralization gives two alcohols. These two alcohols are cyclohexanol and ethanol. This reaction involves Grignard reaction.

<h3>What is Grignard reaction?</h3>

Alkyl, allyl, vinyl, or aryl-magnesium halides (the Grignard reagent) are added to a carbonyl group in an aldehyde or ketone to produce the Grignard reaction. The creation of carbon-carbon bonds depends on this process.
An organic halide reacts with magnesium, but it does not undergo a Grignard reaction; instead, it produces a Grignard reagent.
The carbon bonded to magnesium acts as a nucleophile and targets the electrophilic carbon atom that is present within the polar bond of a carbonyl group because carbon is more electronegative than magnesium.
Usually, the Grignard reagent is added to the carbonyl through a six-membered ring transition state.

To learn more about Grignard reagent with the given link

brainly.com/question/17135014

#SPJ4

7 0

1 year ago