3 Cu + 8 HNO3 = 3 Cu(NO3)2 + 2 NO + 4 H2O i dont know how to explain it but this is the balanced equation basically all the atoms of every element has to be balanced
Anwser: 4:15
You add 45 minutes to 30 minutes which comes out to be 75 minutes, subtract that from 60 because there are only 60 minutes in an hour, which is 15.. so it's 4:15
The moles of hydrogen required for the synthesis of 13.78 mol ethane has been 27.56 mol. Thus, option C is correct.
The balanced chemical equation for the synthesis of ethane has been:
In a balanced chemical equation for the synthesis of 1 mole of ethane, 2 moles of hydrogen is required.
The moles of hydrogen required for the synthesis of 13.78 mol of ethane has been:
The moles of hydrogen required for the synthesis of 13.78 mol ethane has been 27.56 mol. Thus, option C is correct.
For more information about balanced equation, refer to the link:
brainly.com/question/7181548
Answer:209.53
Explanation:
Molar concentration=moles/Volume. Volume is given as 750mL which can be converted as 0.75l,so moles of CuBr2 is molar concentration ×Volume= 1.25×0.75=0.9375
Mole =mass of CuBr2/molecular Mass of CuBr2.
Molecular Mass of CuBr2 is 63.5+80×2=223.5(mass number of Cu=63.5 and Br=80).
So mass required= 223.5×0.9375=209.53g