The scientific method is series of six steps used to answer questions or investigate

Chemistry

1 answer:

Irina18 [472]3 years ago

7 0

The answer would be C. Before you can form a hypothesis you must first have a question.

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Identify the number of moles in 369 grams of calcium hydroxide. Use the periodic table and the polyatomic ion resource.

topjm [15]

Answer : The number of moles in 369 grams of calcium hydroxide is, 4.98 moles

Explanation : Given,

Mass of calcium hydroxide = 369 g

Molar mass of calcium hydroxide = 74.093 g/mole

Formula used :

$\text{Moles of calcium hydroxide}=\frac{\text{Mass of calcium hydroxide}}{\text{Molar mass of calcium hydroxide}}$

Now put all the given values in this formula, we get the moles of calcium hydroxide.

$\text{Moles of calcium hydroxide}=\frac{369g}{74.093g/mole}=4.98mole$

Therefore, the number of moles in 369 grams of calcium hydroxide is, 4.98 moles

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Is sulfur a metal, nonmetal, metalloid, or noble gas?

Blababa [14]

Sulfer is a nonmetal

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777dan777 [17]

The empirical formula is P₂O₃

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You're provided a 0.50 M solution of HCl. How many moles of HCl are present in 25 ml of this solution?

ddd [48]

Answer:

0.0125 moles of HCl

Explanation:

(0.50 mol/L)(0.025 L) = 0.0125 moles of HCl

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how does an airplane’s kinetic energy and potential energy change as it takes off and lands? How does this energy change relate

mojhsa [17]

Answer: As the airplane goes higher, the mechanical energy is changed into gravitational potential energy. While flying, some energy is lost through drag to thermal (heat) energy and sound energy. Some is also lost as the plane makes the air around it move. ... As speed and height decrease, kinetic and potential energy decrease.

Explanation:

Hope this help

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3 years ago