A 71.2 grams of sample of oxalic acid, (H2C2O4) was dissolved in 1.00 Litres of solution. How would you prepare 1.00 Litres of 0.150 Molars (H2C2O4) from this solution?

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

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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a