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FinnZ [79.3K]
3 years ago
5

List 5 special properties that may help identify certain minerals

Chemistry
1 answer:
pochemuha3 years ago
3 0
Easy
 <span>Color, hardness, crystal habit, streak, and specific gravity.</span>
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The decomposition of 3.32 g CaCO3 yields 1.24 g CaO. What is the percent yield of this reaction? (CaCO3 --&gt; CaO + CO2)
alex41 [277]

Answer:

66.57%

Explanation:

The decomposition reaction of calcium carbonate is shown below as:

CaCO_3\rightarrow CaO+CO_2

Calculation of moles of CaCO_3 :

Amount = 3.32 g

Molar mass of CaCO_3 = 100 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus, moles are:

moles= \frac{3.32\ g}{100\ g/mol}

moles= 0.0332\ mol

According to reaction,

0.0332 moles of CaCO_3 decomposes to yield 0.0332 moles of CaO

Theoretical yield = 0.0332 moles

Calculation of moles of CaO formed as:

Amount = 1.24 g

Molar mass of CaO = 56 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus, moles are:

moles= \frac{1.24\ g}{56\ g/mol}

moles= 0.0221\ mol

Experimental yield = 0.0221 moles

Yield\%=\frac {Experimental yield}{Theoretical yield}\times 100

Thus,

Yield\%=\frac {0.0221}{0.0332}\times 100

<u>Percent yield = 66.57%</u>

5 0
4 years ago
Which is an example of a mixture made of parts that can easily be separated?
RideAnS [48]
D Snack Mix because they are individual parts that can easily be seperated
3 0
3 years ago
Read 2 more answers
A vehicle is traveling at a speed of 92.5 km/h. What is this value in feet per second? Note that, by definition, 1 in = 2.54 cm.
Harlamova29_29 [7]

Answer:

v=84.3\frac{ft}{s}

Explanation:

Hello,

In this case, given that 1 kilometer equals 1000 meters, 1 meter equals 3.281 feet and 1 hour equals 3600 seconds, the required velocity in feet per second turns out:

v=92.5\frac{km}{h}*\frac{1000m}{1km}  *\frac{3.281ft}{1m} *\frac{1h}{3600s}\\ \\v=84.3\frac{ft}{s}

Regards.

7 0
3 years ago
Hydroelectric power is produced using the energy of moving water. Which description tells how this process is accomplished? Wate
Ad libitum [116K]

The correct answer is; Water flowing downstream is held up in a reservoir behind a dam. Some water moves down channels through turbines connected to generators which produce electricity.

Further Explanation:

Hydroelectric power is being used more in recent times than in the past. Hydroelectric power is a more cleaner energy source than the coal plants that produce electricity.

Hydroelectric power plants are built within a dam system and uses the water as source of energy. The water goes into channels created that hits the turbines, the turbines are then moved around by the water and these are connected to the large generators and this produces electric. There are many new hydroelectric plants being built. One of the newest hydroelectric power plants is located in Pella, Iowa.

Learn more about hydroelectric power at brainly.com/question/11668688

#LearnwithBrainly

5 0
4 years ago
Read 2 more answers
Which statement about living things and their environment is true?
Alisiya [41]

Answer:

Which statement about living things is true?

All living things are made of cells, use energy, respond to stimuli, grow and reproduce, and maintain homeostasis

Explanation:

7 0
3 years ago
Read 2 more answers
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