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2 years ago

(01.03 MC)

Chemistry

1 answer:

vlada-n [284]2 years ago

5 0

Answer:

Explanation:

What you know is that the electrical energy comes from the wind turbine. Therefore the x must identify the type of energy that the wind turbine represents.

It must represent mechanical energy because blades of the wind turbine turns to produce electrical energy.

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Name and describe three measures of central tendency used to summarize data.

Yuliya22 [10]

The answer is mean,mode and median

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3 years ago

if 28.5 g of calcium hydroxide is dissolved in enough water to make 185g of solution what is the percent by mass of calcium hydr

DENIUS [597]

The percent by mass of calcium hydroxide in the solution : 15.41%

<h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

Mass of solute (Ca(OH₂-Calcium hydroxide) : 28.5

Mass of solution = 185 g

$\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%\\\\\%mass=\dfrac{28.5~g}{185~g}\times 100\%\\\\\%mass=15.41\%$

6 0

3 years ago

QUESTIONS

vagabundo [1.1K]

Answer:

Explanation:

3 0

3 years ago

On the moon, there is no air resistance. What forces (F) are acting on the hammer and

Kipish [7]

Answer:

Gravitional Force

Explanation:

Every planet has a gravitational pull which attracts all objects; the moon is no exception. It says forces in the question but I know for sure gravitational force is apart of it.

3 0

2 years ago

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Given the incomplete equation 4Al + 3O2 → 2X, what compound is X?

Sever21 [200]

<h3><u>Answer</u>;</h3>

B) Al2O3

<h3><u>Explanation;</u></h3>

Aluminium reacts with oxygen to form aluminium oxide.

The chemical reaction for the reaction between Aluminium and Oxygen is;

4Al+ 3O₂→ 2Al₂O₃

Therefore;

Compound X is Aluminium oxide (Al₂O₃)

8 0

3 years ago

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