3 years ago

Can a element be decomposed by chemical means

1 answer:

7 0

No, an element is a pure substance, it cannot be broken down into simpler substances or be decomposed by chemical means.

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If after heating the reaction between magnesium and hydrochloric acid, the mass of the magnesium chloride and beaker is measured

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Since the beaker was heated we can asume that only magnesium cloride is left in the beaker, therfore the difference between the beaker with magnesium chloride and the empty beaker give the mass of magnisium chloride:

$\text{mass MgCl}_2=massbeakerwithMgCl_2-mass\text{ emprty beaker =37.83 g - 33.95g = 3.8}8g$

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1 year ago

Some plz help me make mnemonic to helpme remember the oder of the planets

Iteru [2.4K]

Answer:

My - Mercury

Very- Venus

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Mother- Mars

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Us- Uranus

Nachos- Neptune

Explanation:

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3 years ago

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creativ13 [48]

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2 years ago

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What is known about a reaction with a positive enthalpy?

MariettaO [177]

Answer: C

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In endothermic reactions, enthalpy is positive, and in exothermic reactions, enthalpy is negative, So, if enthalpy is positive, then it is an endothermic reaction, and hence is required for the reaction to occur.

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2 years ago

5. Write the names of the following ions.

Talja [164]

A.) Phosphate ion or Orthophosphate
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2 years ago