PLEASE HELP ASAP!

What mass of Na2SO4 is needed to make 2.5 L of 2.0 M solution? (Na = 23g; S = 32g; 0 = 16g)

A. 178g

B. 284g

C. 365g

D. 710g**

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Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

How many grams of mgbr2 are needed to produce 75g or metal?

Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest