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3 years ago

14

PLEEAASSEE HELP ITS ALREADY WAY PAST DUE AND ILL GIVE BRAINLIEST

1 answer:

Softa [21]3 years ago

6 0

Answer:

A. unexpected change in odor

Explanation: Common physical changes include melting, change of size, volume, color, density, and crystal form. Example the classic baking soda and vinegar reaction provides evidence of a chemical change due to the formation of a gas and a temperature change.

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Which of the following word best describe the diagram

adoni [48]

does it have multiple choice

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3 years ago

What is deforestation?

snow_lady [41]

Answer:

D.

Explanation:

The action of clearing a wide area of trees.

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3 years ago

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Give the products of the reaction of butanal, with: (a) sodium borohydride, in methanol (b) hydrogen cyanide, with catalytic cya

miss Akunina [59]

Answer:

Answers are given below

Explanation:

(a) Aldehyde groups are reduced by sodium borohydride in methanol to give alcohol.

So, butanal produces butanol on reaction with sodium borohydride in methanol.

(b) Aldehyde forms cyanohydrin when they are treated with HCN with catalytic cyanide.

(c) Aldehydes are oxidized by potassium dichromate in dil. sulphuric acid to produce carboxylic acid.

(d) Aldehyde produces acetal with methanol and a trace amount of acid catalyst.

(e) Aldehyde gives condensation reaction with $CH_{3}CH_{2}NH_{2}$ to produce imine.

Structures of products for the given reaction has been shown below.

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3 years ago

The reaction A + BC --> B+ AC is a<br> reaction.

jekas [21]

Explanation:

its answer is displacement reaction

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3 years ago

How many protons and neutrons does the isotope Ab-298 have? 118 protons and 200 neutrons 200 protons and 178 neutrons 119 proton

damaskus [11]

Answer:

119 protons and 179 neutrons

Explanation:

Given an element of the form AB-298, we know that 298 is the mass, which means it's the sum of the number of protons and number of neutrons.

Look at the answer choices and find the one whose numbers add up to 298. Only C (119 protons and 179 neutrons) is correct because 119 + 179 = 298.

Hope this helps!

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3 years ago

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