3 years ago

How could an indicator be used to find out something is acidic or alkaline if the label was missing?

1 answer:

3 0

Just measure based on scale pH 0 to pH 14 and observed the colour changes where under 7 is acidic and it turns indicator into red, while 7 above is alkaline which produce dark purple

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Did diagram shows embryo development of four different animals. How is this evidence used to suggest that life changes over time

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It suggests that life changes over time by showing different animals at different stages in their life, also giving more than one example on how they can change during early development and throughout their lives

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4 years ago

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Explain reaction of metals with the following with the help of chemical equations. i) with acids ii) with oxygen iii) with water

Amiraneli [1.4K]

i. When an acid reacts with metal, a salt and hydrogen are produced:

ii. When oxygen and metal react, metal oxide forms also known as rust

iii. metal and water produce hydrogen gas

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3 years ago

A sample of gas has a volume of 4.4 liters when the pressure is 3.3atm. What is the volume when the pressure is reduced to 2.2at

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You'll remain with 2.9 liter

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4 years ago

What purpose does fecl3 serve in the electrophilic aromatic substitution reaction between chlorine and benzene?

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The reason does FeCl3 serve in the electrophilic sweet-smelling substitution response amongst chlorine and benzene is that it fills in as a Lewis corrosive impetus by responding with the Cl2 and along these lines actuates it toward assault by benzene's π electrons.

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3 years ago

Describe the spin of carbon-14's valence electrons and explain how you came about your answer.

Snezhnost [94]

we have to know the spin of valence electrons of carbon-14

There are four unpaired electron which are called as valence electron also.The spin of the four unpaired electron is either upfilled or down filled.

The ground state electronic configuration of C-atom is 1s²2s²2p² and one electron from 2s orbital gets excited to 2p orbital. The elctronic configuration in excited state is 1s²2s¹ $2p_{x}^{1} 2p_{y}^{1}2p_{z}^{1}$ .

The electron jumps because half-filled orbitals are more stable. Exchange energy is less than pairing energy.

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3 years ago