- 1.15g of Na2CO3 2. 8g of KCl 3. 3g of Al (find the mole)?

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How do you calculate how many Barium atoms it would take to make a one inch line using the atomic radius of 270 pm? Box charges on invoices? Simplify (1-a/a) / (a-1) its suppose to be -1/a but I don t know how to get there. Please show steps? Find the height of the cone with the diameter of 2/3 foot:Volume=1/18*3.14ft^3? How and why through processes of population adaptation and niche construction has biological evolution modified the hominin brain?