%40'lık 400 gram şeker çözeltisine kaç gram şeker eklenirse çözelti %50'lik olur? A)100 B)80 C)60 D)40 E)20​

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

i think that the answer is c