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lorasvet [3.4K]
3 years ago
7

Which characteristic of life is demonstrated when eagles use sharp talons to grab fish from the water?

Chemistry
2 answers:
Anna35 [415]3 years ago
8 0
A..........................
Elenna [48]3 years ago
8 0
The answre is a hope this helps
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How many covalent bonds are in a nitrogen molecule?
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3 covalent bonds (there are 2 electrons in the first orbital and 5 in the second. You still have room for three more)
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What is the molar mass of zinc metal
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Convert this molecular formula into a structure that is consistent with the usual bonding patterns. C2h6o if more than one struc
Eddi Din [679]

The given formula contains two carbon along with six hydrogen and an oxygen.

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A lead mass is heated and placed in a foam cup calorimeter containing 40.0 mL of water at 17.0°C. The water reaches a temperatur
lbvjy [14]

Answer: 502 Joules

Explanation:

To calculate the mass of water, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}

Density of water = 1 g/mL

Volume of water = 40.0 mL

Putting values in above equation, we get:

1g/mL=\frac{\text{Mass of water}}{40.0mL}\\\\\text{Mass of water}=(1g/mL\times 40.0mL)=40.0g

When metal is dipped in water, the amount of heat released by lead will be equal to the amount of heat absorbed by water.

Heat_{\text{absorbed}}=Heat_{\text{released}}

The equation used to calculate heat released or absorbed follows:

q=m\times c\times \Delta T

q = heat absorbed by water

m = mass of water = 40.0 g

T_{final} = final temperature of water = 20.0°C

T_{initial = initial temperature of water = 17.0°C

c = specific heat of water= 4.186 J/g°C

Putting values in equation 1, we get:

q=40.0\times 4.186\times (20.0-17.0)]

q=502J

Hence, the joules of heat were re-leased by the lead is 502

5 0
3 years ago
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