The following list contains some common polyatomic lons. Using the charge on these lons and the idea of valence, predict the formulas for the following:
nitrate
NO 3
phosphate
PO 3
sulfate
SO, 2
acetate
C₂H₂O21
ammonium
NH4
chromate
Cro-2
carbonate
CO, -2
dichromate Cr 20,-2
permanganate MnO4

5x+10 is the correct one

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step-by-step explanation:

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step-by-step explanation:

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.