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3 years ago

What was Johann Dobereiner’s contribution to the development of the periodic table?

Chemistry

2 answers:

Novay_Z [31]3 years ago

5 0

He identified triads of elements that had similar properties

umka21 [38]3 years ago

3 0

he introduced his law of triads. each triad was a group of three elements

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Classify which compounds will dissolve in water and which ones will not dissolve in water.

vredina [299]

Answer:

Dissolves in water: Acetone, 1-propanol, Methanol

Do not dissolve in water: Hexane, Decane

Explanation:

From the principle that like dissolves like,polar substances will dissolve in polar solutions, while non-polar substances will dissolve in non-polar substances.

Water is a polar solution, therefore, polar substances will dissolve in it.From the given options:

Acetone is a polar molecule, therefore, it will dissolve in water.

1-propanol is a polar molecule, therefore, it will dissolve in water.

Hexane is a non-polar molecule, therefore, it will not dissolve in water.

Methanol is a polar molecule, therefore, it will dissolve in water.

Decane is a non-polar molecule, therefore, it will not dissolve in water

6 0

3 years ago

In glycolysis, as in all the stages of cellular respiration, the transfer of electrons from electron donors to electron acceptor

Brums [2.3K]

Answer:

Oxidized,Reduced,reductant,oxidant, NAD+,NADH

Explanation:

1 when a compound donates electrons the compound becomes oxidized.such a compound is referred to as electron donor.

2 when a compound accept electron the compound becomes reduced such a compound often referred to as electron acceptor.

3 In glycolysis once the carbon containing compound that functions as electron donor is reductant.

4 once the electron donor in glycolysis gives up its electron ,it is oxidized to a compound called oxidant.

5 NAD+ is the compound that function as electron acceptor in glycolysis.

6 The reduced form of electron acceptor in glycolysis is NADH.

5 0

3 years ago

What Element is named for the inventor of dynamite

timama [110]

Nobelium discovered in Berkeley California

8 0

3 years ago

Is soidum bicarbonate and silver nitrate reacting a chemical or physical change?

Tanzania [10]

sodium bicarbonate and silver nitrate reacting is a chemical change

3 0

4 years ago

You have a board, wood blocks, and a toy car. Your goal is to build a ramp that sends the car as far across the floor as possibl

lakkis [162]

Answer:

<h3>The board should be placed at about an 80-88 degrees angle. </h3>

Explanation:

This will speed the car up and increase its speed as going down the ramp.

5 0

3 years ago

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