rs. Rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. Which combination could she use to produce the hydrogen she needs? NaOH and oil Zn and KOH H2SO4 and CaCO3 Mg and HCl

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rs. Rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. Which combination could she use to produce the hydrogen she needs? NaOH and oil Zn and KOH H2SO4 and CaCO3 Mg and HCl

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Option D is correct.

Explanation: We use reaction sequences (attached below) for this purpose.

In Option D, because magnesium is higher in reaction layers, so it will easily dislodge hydrogen from hydrochloric acid.

When metals react with acids they produce salt and hydrogen gas.

Magnesium and hydrochloric acid react to form magnesium chloride and hydrogen gas.

In Options A and C, the reaction does not release hydrogen gas.

In Option B, the reaction does not proceed because Zinc is below the potassium in the reaction layer, so it will not displace Potassium.