Question

bubbles are seen coming out of a reaction. angela holds an upside down test tube over the reaction to trap the gas while her lab partner, gerardo, lights a match under the trapped gas. they hear a pop sound. the gas is most likely...

$\bigcirc h_2o(g)$

$\bigcirc co_2(g)$

$\bigcirc h_2(g)$

$\bigcirc cl_2(g)$

$\bigcirc nh_3(g)$

$\bigcirc ar(g)$

$\bigcirc n_2(g)$

check answer

Explanation:

• \(H_2O(g)\) (water vapor) is not flammable in the way described.
• \(CO_2(g)\) is a non - flammable gas and is used for fire - extinguishing in some cases.
• \(H_2(g)\) is highly flammable. When a small amount of hydrogen gas is ignited (in the presence of oxygen), it burns rapidly and can produce a “pop” sound. This is a classic test for hydrogen gas.
• \(Cl_2(g)\) is a toxic and reactive gas but not flammable in the context of this simple “pop” test.
• \(NH_3(g)\) has a pungent smell and is not typically associated with a “pop” sound when ignited in a simple laboratory test like this.
• \(Ar(g)\) (argon) is an inert gas and does not burn.
• \(N_2(g)\) is a non - flammable gas as it is very stable.

Answer:

\(H_2(g)\)