mrs. rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. which combination could…

mrs. rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. which combination could she use to produce the hydrogen she needs?\no naoh and oil\no zn and nacl\no h₂so₄ and caco₃\no mg and hcl

mrs. rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. which combination could she use to produce the hydrogen she needs?\no naoh and oil\no zn and nacl\no h₂so₄ and caco₃\no mg and hcl

Answer

Explanation:

Step1: Recall metal - acid reaction

Metals react with acids to produce hydrogen gas.

Step2: Analyze each option

  • NaOH and oil: No reaction to produce hydrogen. NaOH is a base, oil is an organic compound.
  • Zn and NaCl: No reaction to produce hydrogen. Zinc does not react with sodium chloride solution to give hydrogen.
  • H₂SO₄ and CaCO₃: Reaction produces carbon - dioxide gas (CaCO₃ + H₂SO₄ = CaSO₄+ H₂O + CO₂↑), not hydrogen.
  • Mg and HCl: Magnesium (a metal) reacts with hydrochloric acid (an acid) according to the equation Mg + 2HCl = MgCl₂ + H₂↑.

Answer:

Mg and HCl