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Svetradugi [14.3K]
3 years ago
5

A student sets up the following equation to convert a measurement. (The stands for a number the student is going to calculate.)

Fill in the missing part of this equation. pa * mm2
Chemistry
1 answer:
Aliun [14]3 years ago
6 0

The question is incomplete, here is the complete question:

A student sets up the following equation to convert a measurement. (The stands for a number the student is going to calculate.) Fill in the missing part of this equation.

23.Pa.cm^3=?kPa.m^3

<u>Answer:</u> The measurement after converting is 23\times 10^{-9}kPa.m^3

<u>Explanation:</u>

We are given:

A quantity having value 23.Pa.cm^3

To convert this into kPa.m^3, we need to use the conversion factors:

1 kPa = 1000 Pa

1m^3=10^6cm^3

Converting the quantity into kPa.m^3, we get:

\Rightarrow 23.Pa.cm^3\times (\frac{1kPa}{1000Pa})\times (\frac{1m^3}{10^6cm^3})\\\\\Rightarrow 23\times 10^{-9}kPa.m^3

Hence, the measurement after converting is 23\times 10^{-9}kPa.m^3

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Which of the following explains the conservation of mass during cellular respiration?
lord [1]

Answer:

The total number of atoms when glucose and oxygen reacts stays the same when carbondioxide and water are produced.

Explanation:

Chemical reaction:

C₆H₁₂O₆  +  6O₂  →  6CO₂ + 6H₂O

We can see that the number of atoms of each element remain same on both side of reaction so law of conservation of mass is followed by this reaction. Six number of carbon atoms twelve number of hydrogen atoms and eighteen number of oxygen atoms are present on both side.

There are two types of respiration:

1. Aerobic respiration  

2. Anaerobic respiration

Aerobic respiration

It is the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.

Glucose + oxygen → carbon dioxide + water + 38ATP

Anaerobic Respiration

It is the breakdown of glucose molecule in the absence of oxygen and produce small amount of energy. Alcohol or lactic acid and carbon dioxide are also produced as byproducts.  

Glucose→ lactic acid/alcohol + 2ATP + carbon dioxide

This process use respiratory electron transport chain as electron acceptor instead of oxygen. It is mostly occur in prokaryotes. Its main advantage is that it produce energy (ATP) very quickly as compared to aerobic respiration.  

8 0
4 years ago
Gasoline is a mixture of compounds. A gasoline sample was found to be 2.851% (by mass) octane (C₈H₁₈). 482.6 g of gasoline is co
Pani-rosa [81]

Answer:

See below.

Explanation:

The mass of octane in the sample of gasoline is 0.02851 * 482.6 =  13.759 g of octane.

The balanced equation is:

2C8H18(l)  +  25O2(g) ---->  16CO2(g)  +   18H2O(g)

From the equation, using  atomic masses:

228.29 g of  octane forms 704 g of CO2 and 324.3 g of H2O

So the mass of CO2 formed from the combustion of 13.759 g of octane = (704 * 13.759) / 228.29

= 42.43 g of CO2.

Amount of water = 324.3 * 13.759) / 228.29

= 19.55 g of H2O.

5 0
3 years ago
The galvanic cell illustrated above generates a potential of +1.10V. For the construction of a second galvanic cell (not shown),
xxTIMURxx [149]

Answer:

The initial  E°  for the second cell is the same as for the first cell.

Explanation:

Because the overall chemical reaction that occurs in the cell does not change.

5 0
3 years ago
What is the freezing point of silver?​
rosijanka [135]

Answer:

1,763°F

Explanation:

I really cant explain it is a little complicated but there is the answer hope it helped you a lot

6 0
3 years ago
Read 2 more answers
What is the kinetic energy, in joules, of a molecule of carbon tetrachloride moving at a speed of 255 m s–1 (use the appropriate
hram777 [196]

Answer:

The kinetic energy of a molecule of carbon tetrachloride is 8.29 zJ.

       

Explanation:

The kinetic energy of a molecule of carbon tetrachloride is given by:

K = \frac{1}{2}mv^{2}

Where:

m: is the mass

v: is the speed = 255 m/s                            

To find the mass we need to find the molar mass for CCl₄, and use the Avogadro's number, knowing that in 1 mol of carbon tetrachloride we have 6.022x10²³ molecules:

A (C) = 12.011 g/mol

A (Cl) = 35.45 g/mol

The molar mass (M) of CCl₄ is:

M = A (C) + 4*A (Cl) = 12.011 g/mol + 4*35.45 g/mol = 153.81 g/mol

Now, the mass of 1 molecule of CCl₄ is:

m = 153.81 \frac{g}{mol}*\frac{1 mol}{6.022 \cdot 10^{23} molecules} = 2.55 \cdot 10^{-22} g = 2.55 \cdot 10^{-25} kg

Finally, the kinetic energy of a molecule of carbon tetrachloride is:

K = \frac{1}{2}mv^{2} = \frac{1}{2}2.55 \cdot 10^{-25} kg*(255 m/s)^{2} = 8.29 zJ

Therefore, the kinetic energy of a molecule of carbon tetrachloride is 8.29 zeptoJoule.

I hope it helps you!

6 0
4 years ago
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