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4 years ago

Which of these is an example of a chemical change?

Chemistry

2 answers:

meriva4 years ago

6 0

The answeeerr is A) GOOD LUCK!! :)

GuDViN [60]4 years ago

5 0

Answer: A. Leaving Cheese out to get moldy

Explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.

Example: Smelling Sprayed perfume : It is only diffusion of gas.

Feeling the ice melt on your skin: It is only change of state.

Crushing ice with a hammer: It is only change of shape.

A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.

Example: Leaving Cheese out to get moldy : It involves oxidation of cheese to form new substances.

Thus Leaving Cheese out to get moldy is a chemical change.

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Answer:

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~batmans wife dun dun dun...

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4 years ago

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hram777 [196]

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The H atom and the Be3³⁺ ion each have one electron. Does the Bohr model predict their spectra accurately? Would you expect thei

lbvjy [14]

Explanation:

a) Bohr model is perfect for atoms that have single electron and fortunately both Be3+ ion and H atom have one electron so, Bohr model can easily and accurately applied to predict the spectrum of Be3+ and H atom.

b) The energy of an atom in Bohr model is given by

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3 years ago