Because as you change the mass the volume will change and as you change the volume the mass will change too, it's a constant ratio for each element. Mass and volume are not factors that affect the density. factors that affect the density are temperature and type of the material/element

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3 years ago

What must happen to make for an ion to from

Mazyrski [523]

Answer:

when atoms lose or gain electrons ions form

Explanation:

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3 years ago

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Classify the following as acid-Base reactions or oxidation-reduction reactions:

postnew [5]

Explanation:

(a) $Na_2S+HCl\rightarrow H_2S+2NaCl$

This is acid base reaction because there is no change of oxidation state on either side of the reaction.

(b) $2Na+2HCl\rightarrow H_2+2NaCl$

This is a oxidation reduction reaction because sodium in elemental state ( 0 oxidation state) oxidizes to Na⁺ in NaCl. Also H⁺ in HCl reduces to H° in H₂.

This is a oxidation reduction reaction because magnesium in elemental state ( 0 oxidation state) oxidizes to Mg²⁺ in MgCl₂. Also Cl° in Cl₂ reduces to Cl⁻ in MgCl₂.

(d) $MgO+2HCl\rightarrow H_2O+MgCl_2$