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3 years ago

Based on the types of elements in the compound are there ionic or covalent? A. KCI B.NO2

Chemistry

1 answer:

Alex3 years ago

7 0

Explanation:

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An example of binary compound is

Dima020 [189]

Answer:

Explanation:

An example of binary compund is ZnI2 is zinc iodide

4 0

3 years ago

Read 2 more answers

How many grams of nickel (+2) are required to replace all of the silver when 15.55 grams of AgNO3 are present?

Karolina [17]

2AgNO3 + Ni2+ = Ni(NO3)2 + 2Ag<span>+</span>

From the reaction, it can be seen that AgNO3 and Ni2+ has following amount of substance relationshep:

n(AgNO3):n(Ni)=2:1

From the relationshep we can determinate requred moles of Ni2+:

n(AgNO3)=m/M= 15.5/169.87=0.09 moles

So, n (Ni)=n(AgNO3)/2=0.045 moles

Finaly needed mass of Ni2+ is:

m(Ni2+)=nxM=0,045x58.7=2.64g

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3 years ago

Someone please help me with this ???

Verizon [17]

Answer:

Explanation:

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3 years ago

The backbone in a nucleic acids strand is called:

Nina [5.8K]

Answer: Option (c) is the correct answer.

Explanation:

Backbone in a nucleic acids strand is made up of sugar molecules attached with phosphodiester bond.

This sugar-phosphate linkage helps in joining of nucleotides in a DNA sequence. Due to this backbone structural framework of nucleotides is formed. In DNA, the sugar is deoxyribose.

Thus, we can conclude that the backbone in a nucleic acids strand is called sugar backbone.

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3 years ago

A plant extract can be obtained with organic solvents such as acetone or ethyl alcohol, and is composed of plant pigments such a

prohojiy [21]

Answer:

Here's what I get

Explanation:

A plant extract is a mixture because it contains different substances: acetone or ethanol, chlorophylls A and B, carotene and xanthophylls.

It is homogeneous because it is a solution. There is only one phase: the liquid phase. You cannot see the pigments as separate phases.

You can separate the pigments by paper, thin layer, or column chromatography.

Many schools use paper chromatography, because paper is cheap.

As the mixture of pigments follows the solvent up the paper, they separate into different coloured bands according to their attractive forces to the cellulose in the paper.

The chlorophylls are strongly attracted to the paper, so they don't travel very far.

The nonpolar carotene molecules have little attraction to the polar cellulose, so they are carried along by the solvent front.

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3 years ago