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amm1812
3 years ago
5

Which statement is true about elements?

Chemistry
1 answer:
ipn [44]3 years ago
7 0

I believe the answer is a

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Manoa falls drops 153 feet, measured the bottom to be 663 liters per second
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Answer:

Manoa

waimea

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Explanation:

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An estser is the reaction product between: a. Alcohol and organic acid
san4es73 [151]
An ester is the reaction product between A. alcohol and organic acid. 
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If a piece of cadmium with a mass of 37.60 g and a temperature of 100.0 oC is dropped into 25.00 cc of water at 23.0 oC, what wi
zlopas [31]

Answer:

T_{eq}=28.9\°C

Explanation:

Hello!

In this case, since it is observed that hot cadmium is placed in cold water, we can infer that the heat released due to the cooling of cadmium is gained by the water and therefore we can write:

Q_{Cd}+Q_{W}=0

Thus, we insert mass, specific heat and temperatures to obtain:

m_{Cd}C_{Cd}(T_{eq}-T_{Cd})+m_{W}C_{W}(T_{eq}-T_{W})=0

In such a way, since the specific heat of cadmium and water are respectively 0.232 and 4.184 J/(g °C), we can solve for the equilibrium temperature (the final one) as shown below:

T_{eq}=\frac{m_{Cd}C_{Cd}T_{Cd}+m_{W}C_{W}T_{W}}{m_{Cd}C_{Cd}+m_{W}C_{W}}

Now, we plug in to obtain:

T_{eq}=\frac{37.60g*0.232\frac{J}{g\°C}*100.00\°C+25.00g*4.184\frac{J}{g\°C}*23.0\°C}{37.60g*0.232\frac{J}{g\°C}+25.00g*4.184\frac{J}{g\°C}}\\\\T_{eq}=28.9\°C

NOTE: since the density of water is 1g/cc, we infer that 25.00 cc equals 25.00 g.

Best regards!

6 0
3 years ago
Why is helium heavier than hydrogen​
Kaylis [27]
Helium has more protons making it heavier by one atomic mass.
7 0
3 years ago
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Write a chemical equation for LiOH(aq) showing how it is an acid or a base according to the Arrhenius definition.
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Answer:

LiOH(aq) → Li⁺(aq) + OH⁻(aq). 

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3 years ago
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