2nh3(g) → n2(g) + 3h2(g) the reaction for the decomposition of ammonia (nh3) can be written as shown. if a student starts with 21.7 g of nh3, how many grams of hydrogen (h2) gas will be produced by the reaction? 1.28 g 32.5 g 2.55 g 3.85 g

3.85 g

Explanation:

1) Balanced chemical equation:

2NH₃(g) → N₂(g) + 3H₂(g)

2) Mole ratios:

2 mol NH₃(g) : 1 mol N₂(g) : 3 mol H₂(g)

3) Convert 21.7 g NH₃ to moles

molar mass of NH₃: 14.007 g/mol + 3×1.008 g/mol = 17.031 g/mol

number of moles = mass in grams / molar mass = 21.7 g / 17.031 g/mol = 1.2741 moles

4) Proportionality

2 moles NH₃ / 3 moles 3H₂ = 1.2741 moles NH₃ / x

⇒ x = 1.2741 × 3 / 2 moles H₂ = 1.911 moles H₂

5) Convert 1.911 moles to grams

molar mass H₂ = 2×1.008 g/mol = 2.016 g/mol

mass in grams = number of moles × molar mass = 1.911 moles × 2.016 g/mol = 3.85 g

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

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