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lana [24]
3 years ago
5

Someone please help me me me

Chemistry
1 answer:
harina [27]3 years ago
4 0
When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure.
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Which statement most accurately describes the behavior of a catalyst?
Elodia [21]
The a answer to the statement is between B and D
3 0
3 years ago
Plzz help<br> its science
Aleks04 [339]

The efficiency : 95%

<h3>Further explanation</h3>

Efficiency : the ratio between output and input work

In general, the value of the output of a machine is less than the value of the input because of the frictional force in the machine.

The greater the efficiency of the engine, the better the machine

Can be formulated :

\tt E=\dfrac{W_{out}}{W_{in}}\times 100\%

w output = 190 J

W input = 200 J

The efficiency :

\tt E=\dfrac{190}{200}\times 100\%=95\%

7 0
3 years ago
2C4H10+13O2--&gt;8CO2+10H2O Using the predicted and balanced equation, How many Liters of CO2 can be produced from 150 grams of
Anna11 [10]

Answer:  233 L of CO_2 will be produced from 150 grams of  C_4H_{10}

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}  \text{Moles of} C_4H_{10}=\frac{150g}{58g/mol}=2.59moles

The balanced chemical equation is:

2C_4H_{10}+13O_2(g)\rightarrow 8CO_2+10H_2O  

According to stoichiometry :

2 moles of C_4H_{10} produce =  8 moles of CO_2

Thus 2.59 moles of C_4H_{10} will produce=\frac{8}{2}\times 2.59=10.4moles  of CO_2  

Volume of CO_2=moles\times {\text {Molar volume}}=10.4moles\times 22.4mol/L=233L

Thus 233 L of CO_2 will be produced from 150 grams of  C_4H_{10}

8 0
3 years ago
A ______ reaction keeps going on its own once started
DochEvi [55]
<span>A chain reaction keeps going on its own once started</span>
7 0
4 years ago
Pick the odd one out<br> Paraffin wax<br> Hexane<br> Ethanol<br> Carbon tetrachloride
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Ethanol is the odd one.....

4 0
2 years ago
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