How are you going to experiment means how will you show your project in a real life situation like a penny being cleaned with different acids.
Answer:

Explanation:
Hello,
In this case, since the first step is to write the properly balanced chemical reaction:

We can see that given the 0.200 g of P4S3 (molar mass 220 g/mol) the mole ratio between it and SO2 (molar mass 64 g/mol) is 1:3, therefore, the produced mass of SO2 turns out:

Best regards.
Answer:
calcium and gold
Explanation:
thats what it said was right
After the addition of 6.47 mL of 0.303 M HCl. Solution :- lets first calculate the moles of the NaOCl and HCl Moles = molarity *volume in liter Moles of NaOCl = 0.100 mol per L * 0.053 L =0.0053 mol Moles of HCl =0.303 mol per L *0.00647L=0.00196