Radioactive zone.
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Answer:
1 mole is equal to 1 moles Potassium, or 39.0983 grams.
39.0983g X 4 = 156.3932
so 4 moles are in 156 grams of Potassium
Explanation:
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0.50 moles of oxygen gas will react.
Balanced chemical eqation for reaction of calcium with oxygen:
2Ca + O₂ → 2CaO
n(Ca) = 1.0 mol; amount of calcium
From balanced chemical reaction, we can see that 2 moles of calcium reacts with one mole of oxygen gas. Ratio of moles is 2 : 1.
n(Ca) : n(O₂) = 2 : 1; ratio of the amount of substance of calcium and oxygen gas
n(O₂) = n(Ca) / 2; two times less amount of oxygen than calcium
n(O₂) = 1.0 mol / 2
n(O₂) = 0.5 mol; amount of oxygen gas needed for this chemical reaction.
More about stoichiometry: brainly.com/question/16060223
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Answer:
Explanation:
Density is found by dividing the mass by the volume.
The mass of the object is 11 grams and the volume is 13 milliliters.
Substitute the values into the formula.
Divide.
Round to the nearest hundredth. The 6 in the thousandth place tells us to round the 4 to a 5.
The density is about <u>0.85 grams per milliliter.</u>