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katrin [286]
3 years ago
9

The measurement

Chemistry
1 answer:
g100num [7]3 years ago
3 0

Answer:

D. 25cm3

Explanation:

if you add a 3 at the end of a number it means volume, therefore making it a solid

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An ordered list of chemical substances is shown.
alina1380 [7]

Answer : The correct option is, (C) 2, 4 and 5.

Explanation :

Combustion reaction : It is a type of reaction in which a hydrocarbon react with an oxygen molecule to give carbon dioxide, water as a product.

For example : Methane react with oxygen to give carbon dioxide and water.

CH_4+2O_2\rightarrow CO_2+2H_2O

In the given list of chemical substances, CuO,Cu_2O,Li_2O are in oxide form. They can not be both reactant and product of a single combustion reaction.

In the given list, C_2H_5NH_2 is the only hydrocarbon which shows a combustion reaction. That means C_2H_5NH_2 react with O_2 to give CO_2,H_2O and N_2 as a product.

The balanced combustion reaction of C_2H_5NH_2 is,

20C_2H_5NH_2+40O_2\rightarrow 40CO_2+7H_2O+10N_2

Therefore, the correct answer is, (C) 2, 4, and 5.

8 0
3 years ago
PLEASE ANSWEER THIS HURRY HURRRRRRRRRYY
klemol [59]
The first one would be it
6 0
4 years ago
MAGNESIUM (Mg)<br> +FLUORINE (F) =
bazaltina [42]

Answer:

MgF2 magnesium fluoride

4 0
3 years ago
Independent variable ​
katrin [286]

Answer:

Independent variable

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6 0
3 years ago
How are the sparks from a sparkler that strike your skin akin to tiny droplets of boiling water striking your skin?
skad [1K]
They both hurt and they both burn lol

they will each create a small burn on your skin if they touch you sometimes visible sometimes not. but both should burn about the same just one is water one is fire
6 0
3 years ago
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