Prepare 30g of cold cream. Calculation: How much water do I need?

Steps to Solve

1. Calculate the Total Initial Weight of Ingredients First, sum the weights of all the ingredients provided (excluding water): $$ Total\ Weight = 50 \text{g} + 15 \text{g} + 1 \text{g} + 16 \text{g} + 1.20 \text{g} $$

2. Perform the Calculation Now calculate: $$ Total\ Weight = 50 + 15 + 1 + 16 + 1.20 = 83.20 \text{g} $$

3. Determine the Required Total Weight for Cold Cream To prepare 30g of cold cream, we need to calculate how much water is required. Knowing that the total mixture should equal 30g: $$ Required\ Weight = 30 \text{g} $$

4. Calculate the Amount of Water Needed Subtract the total weight of the ingredients from the required total weight: $$ Water\ Needed = Required\ Weight - Total\ Weight $$ $$ Water\ Needed = 30 \text{g} - 83.20 \text{g} $$

5. Perform the Final Calculation Now calculate the amount of water: $$ Water\ Needed = 30 - 83.20 = -53.20 \text{g} $$

Since the calculated value indicates we don't need water because the total weight of solid ingredients exceeds the desired final weight, we conclude that it's not feasible to create 30g of cold cream with the given proportions.