mass - a physical quantity of matter in an object. Mass is measured in terms of the weight of a body.

12.66 g of calcium are heated in air,17.73 g of calcium oxide is formed.The percent oxygen in the co

12.66 g of calcium are heated in air,17.73 g of calcium oxide is formed.The percent oxygen in the compound is?
17.73g Calcium oxide - 12.66g Calcium = 5.07g Oxygen
Mass of the element / Mass of the compound * 100%
= 5.07g O / 17.73g CaO2 X 100%
= 28.6% of Oxygen in the compound
[B][U]Check Your Work [/U][/B]
Mass of the element / Mass of the compound X 100%
= 12.66g Ca ÷ 17.73g CaO2 X 100%
= 71.4% Ca
71.4% Ca + 28.6% O = 100% CaO2

Body Mass Index (BMI)

Free Body Mass Index (BMI) Calculator - Solves for the popular health measurement of Body Mass Index or Weight using inches and pounds input or meters and kilos input.

Also calculates the estimated surface area of the body using the Mosteller Formula

Also calculates the estimated surface area of the body using the Mosteller Formula

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Free Chemical Compounds Calculator - Shows details of the chemical compounds including name, formula, and molar mass

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Free Density Calculator - Solves for any of the 3 items in the Density Formula, Density (D), Mass (M), and Volume (V) (Capacity), with 2 given items.

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Free Gravitational Force Calculator - Using Sir Isaac Newtons Law of Gravitational Force, this calculator determines the force between two objects with mass in kilograms at a distance apart in meters using the constant of gravity.

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Free Molar Mass Calculator - Calculates the molar mass of an element or solution.

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Free Moment of Inertia Calculator - Calculates any of the 3 items from the Moment of Inertia equation, Inertia (I), Mass (M), and Length (L).

Of the 20 boats at the Mariana, 10 were from Massachusetts. What is the probability that a randomly

Of the 20 boats at the Mariana, 10 were from Massachusetts. What is the probability that a randomly selected boat will be from Massachusetts?
P(Boat from Massachusetts) = Number of Massachusetts boats / Total Boats at the Mariana
P(Boat from Massachusetts) = 10/20
[URL='https://www.mathcelebrity.com/fraction.php?frac1=10%2F20&frac2=3%2F8&pl=Simplify']Simplifying this fraction, we get[/URL]:
P(Boat from Massachusetts) = [B]1/2[/B]