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hoa [83]
3 years ago
14

A small 15 kilogram canoe is floating downriver at a speed of 4 m/s. What is the canoe's kinetic energy?

Chemistry
1 answer:
Fofino [41]3 years ago
7 0

<span>m=15 kg mass of object</span>

<span>v=4 <span>ms</span> velocity of object</span>

<span><span>Ek</span>=<span>12</span>⋅15⋅<span>22</span></span>

<span><span>Ek</span>=<span>12</span>⋅15⋅4</span>

<span><span>Ek</span>=15⋅4</span>

<span><span>Ek</span>=40<span> Joules</span></span>

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If 2.5 grams of calcium bromide reacted with excess lithium oxide, how many grams of bromide product would be formed?
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Answer: 2.17 g of  bromide product would be formed

Explanation:

The reaction of calcium bromide with lithium oxide will be:

CaBr_2+Li_2O\rightarrow 2LiBr+CaO

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of calcium bromide}=\frac{2.5g}{199.9g/mol}=0.0125moles

As lithium oxide is in excess, calcium bromide is the limiting reagent.

According to stoichiometry :

1 mole of CaBr_2 produce = 2 moles of LiBr

Thus 0.0125 moles of CaBr_2 will require=\frac{2}{1}\times 0.0125=0.025moles  of NH_3

Mass of LiBr=moles\times {\text {Molar mass}}=0.025moles\times 86.8g/mol=2.17g

Thus 2.17 g of  bromide product would be formed

3 0
3 years ago
Loess helps to form very fertile soil. Please select the best answer from the choices provided T F
Feliz [49]

The given statement is true.  

A classic, predominantly silt-sized sediment, which is produced due to the gathering of wind-blown dust is known as loess. About 10 percent of the land region of the Earth is covered by loess or identical sediments. The loess seems to form into very rich soils. Under suitable climatic circumstances, it is one of the most agricultural productive terrains around the globe.  

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7 0
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An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. What other characteristic does the radiation
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4 years ago
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Mamont248 [21]

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Explanation:

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