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3 years ago

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While elements and compounds can both be classified as pure substances because they have distinct properties and composition, __

________ cannot be decomposed further. A) compounds B) elements C) formulas D) molecules

2 answers:

Tresset [83]3 years ago

4 0

Elements as they are fundamental (one single hydrogen atom is still an element

makkiz [27]3 years ago

3 0

Elements or answer b

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What happen to the energy that is lost when water change to gas

Y_Kistochka [10]

Answer:

This process, which is the opposite of vaporization, is called condensation. As a gas condenses to a liquid, it releases the thermal energy it absorbed to become a gas. During this process, the temperature of the substance does not change. The decrease in energy changes the arrangement of particles.

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2 years ago

Consider the balanced equation. 2HCl + Mg MgCl2 + H2 If 40.0 g of HCl react with an excess of magnesium metal, what is the theor

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Answer:

Theoretical yield of hydrogen is 1.11 g

Explanation:

Balanced equation, $Mg+2HCl\rightarrow MgCl_{2}+H_{2}$

As Mg remain present in excess therefore HCl is the limiting reagent.

According to balanced equation, 2 moles of HCl produce 1 mol of $H_{2}$ .

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So, 40.0 g of HCl = $\frac{40.0}{36.46}moles$ of HCl = 1.10 moles of HCl

Hence, theoretically, number of moles of $H_{2}$ are produced from 1.10 moles of HCl = $(\frac{1}{2}\times 1.10)moles=0.550moles$

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3 years ago

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I will take a picture of the question

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Answer:

yes as you wish

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As a sample's temperature increases, which two factors also increase? A. Particle speed B. Particle kinetic energy C. Particle b

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C.

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