40,500 mg---> 3 SF Zeros to the left of an understood decimal point and at tge same time to the right of a non zero number and not significant. The zero in between non zeros(4&5) is significant.
Antimony cannot be broken down by chemical means because it is an element, a principle building block of matter. All other choices are compounds, which can be separated if put through enough stress to break the bonds between the atoms.
Sound waves.
Radio waves and Microwaves are non-ionizing radiation. Gamma waves are ionizing radiation
1) determine molar mass of K₃PO₄
2) determine total mass of potassium atoms in K₃PO₄
4) divide by molar mass and multiply by 100
×
= 55.25981062% (round as you wish)
I would say that there is 270 grams left. since its F2 you have three things there.
divide 405 by 3
you will get 135.
but there are 2 F's so multiply that by 2 and you will get 270.
the final answer should be 270 grams left.