What would the % p, on the npk ratio, be reported as for a 100g sample containing 7.5g of phosphorous?

Ans: 7.50% of P

Given:

Mass of NPK sample = 100 g

Mass of P in sample = 7.5 g

To determine:

The % P in the given sample

Explanation:

The percent of a particular substance (say,X) in a given total amount (M) is generally expressed as:

% X = [Mass of X/Total mass]*100

In this case:

%P = [mass of P/mass of NPK sample]*100

    = [7.5/100]*100 = 7.5%

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).