The correct answer is: $5\text{ g}$ (for water; the mass varies by ingredient)
Explanation
- A culinary teaspoon is commonly taken as $1\ \text{tsp} = 5\ \text{mL}$ (US teaspoon is $4.92892\ \text{mL}$ but is usually rounded to $5\ \text{mL}$).
- Mass = volume × density, so for water (density $1\ \text{g/mL}$) you get $5\ \text{mL}\times1\ \text{g/mL}=5\ \text{g}$.
Steps:
- $1\ \text{tsp} = 5\ \text{mL}$
- $\text{mass} = \text{volume}\times\text{density}$
- For water: $\text{mass}=5\ \text{mL}\times1\ \text{g/mL}=5\text{ g}$
Common approximate conversions (rounded):
- Water / most thin liquids: 1 tsp ≈ 5 g
- Granulated sugar: 1 tsp ≈ 4.2 g
- Brown sugar (packed): 1 tsp ≈ 4.7 g
- Table salt: 1 tsp ≈ 6 g (kosher salt varies widely by crystal size)
- All-purpose flour: 1 tsp ≈ 2.6 g
- Butter: 1 tsp ≈ 4.7 g
- Honey: 1 tsp ≈ 7 g
- Vegetable oil: 1 tsp ≈ 4.6 g
Note: These are approximate. For baking or precise nutrition labeling, weigh the ingredient on a kitchen scale or tell me which ingredient you want and I’ll give a more specific conversion.