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Rasek [7]
3 years ago
9

A large bar of solid gold is melted into liquid. The liquid is then poured into molds to make a number of gold coins. Was this a

chemical or physical change? Explain
Chemistry
1 answer:
Kobotan [32]3 years ago
8 0

Answer:

it's physical change because none of the components of the bar of solid have been tampered with so solid to liquid is physical change

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Blood ph is kept near a value of 7.3 - 7.5 because of
Ede4ka [16]

Answer:  Neutral Value

Explanation:  pH of the blood is maintained at 7.0 to 7.5that is neutral value.

This is because if the pH of the is lower than the maintained value then it will become acidic .

Acidic pH can cause the medical urgency known as acidosis leading to vomiting, diarrhea etc.

If the pH becomes higher, then the blood will become basic in nature and it can also leas to the death of the person.

That is why the pH of the blood is maintianed at neutral value of 7.0 to 7.5

5 0
4 years ago
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Answer:

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3 years ago
Why can water pass through sandstrone but not through shale
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It really depends on the 'type' of rock it is. By this I mean whether it's impermeable or permeable. Impermeable rocks don't allow water through and permeable rocks do. It has to do with how 'porous' a rock is: how many openings it has and how spaced apart are its particles are. Sandstone is permeable and Shale impermeable.
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What is the mass in grams of 4.91 moles of ammonium sulfate?
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What is the best way to organize desert several several million different types of organisms on earth
SCORPION-xisa [38]

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The desert should be divided into different types based on its properties. The organisms living in specific type of desert should be named accordingly.

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