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2 years ago

Which of the following represent chemical processes? Which represent physical processes?

Chemistry

1 answer:

Viktor [21]2 years ago

7 0

Answer:

A). Calcium chloride dihydrate (CaCl2 * 2H2O) slowly heated in a crucible to become calcium chloride (anhydrous).

Dehyration is a physical process

B). A hydrocarbon such as propane (C3H8) undergoes combustion to power a grill

Combustion is a chemical process.

C). A rock climber’s rope becomes frayed and turns the color of the rocks

This is physical process

D). A dog urinates on an air conditioner coil and the coil becomes corroded

Corrsion is a chemical process.

Explanation:

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2 years ago

How can i find the number of electrons are gained or lost

wel

15. 1 were lost

16. 3 were gained

17. 2 were lost

18. 1 was gained

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2 years ago

A student burned 0.250 g of magnesium metal in an open crucible.Oxygen from the air combined with the metal forming magnesium ox

Varvara68 [4.7K]

Answer:

0.171 grams of oxygen combined with the metal.

Explanation:

$2Mg+O_2\rightarrow 2MgO$

Mass of magnesium oxide produced = 0.421 g

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Suppose reaction completely converts the magnesium into magnesium oxide.

Mass of oxygen combined with magnesium = m

0.421 g = 0.250 g + m

m = 0.421 g - 0.250 g = 0.171 g

0.171 grams of oxygen combined with the metal.

5 0

3 years ago

When Al(NO3)3 is separated into its ions, how is it written?

nikklg [1K]

Al (+3)
NO3 (-1)
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3 0

3 years ago

Read 2 more answers

Can you help me with this?

sergey [27]

Look those up it will be easier

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2 years ago