If you are given a stock concentration of 0.00099 M in 0.5 H2SO4 of potassium dichromate

If you are given a stock concentration of 0.00099 M in 0.5 H2SO4 of potassium dichromate. Then dilute 5 mL of potassium dichromate with 20 mL of H2SO4. What is the concentration

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