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ICE Princess25 [194]
2 years ago
5

Please write down the definitions of elements, compounds, mixtures, homogenous mixtures, and heterogenous mixtures.

Chemistry
2 answers:
Ahat [919]2 years ago
7 0
If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture
MA_775_DIABLO [31]2 years ago
3 0

A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.

A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.
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The flame in a torch used to cut metal is produced by burning acetylene (C2H2) in pure oxygen. Assuming the combustion of 1 mole
Nookie1986 [14]

Answer:

19.8 kg of C₂H₂ is needed

Explanation:

We solve this by a rule of three:

If 1251 kJ of heat are relased in the combustion of 1 mol of acetylene

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(95.5×10⁴ kJ . 1) /1251kJ = 763.4 moles of C₂H₂

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If we convert the mass from g to kg →  19848 g . 1kg / 1000g = 19.8 kg

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The reaction of an Arrhenius acid with an Arrhenius base produces water and <span>A) a salt</span>
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3
atroni [7]

Answer:

(1) atomic numbers

Explanation:

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