Spray dilution calculation

Mr. Blažek is preparing a solution for the winter spraying of trees. He read the instructions: "We dilute in a ratio of 1:100. "How much of the spray can be poured into two liters of water? (There is always more water in the spray. )

Final Answer:

V =  20 ml

Step-by-step explanation:

$$\begin{gathered} V_2=2\text{l} \\ {V}_1:V_2=1:100 \\ {V}_1=1/100\cdot V_2=1/100\cdot 2=\frac{1}{50}=0.02\text{l} \\ V=V_1\to \text{ml}=V_1\cdot 1000\text{ml}=0.02\cdot 1000\text{ml}=20\text{ml}=20\text{ml} \end{gathered}$$

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