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hodyreva [135]
3 years ago
14

Match the sequence number with the energy transformations from the water behind a hydroelectric dam to the lighting

Chemistry
1 answer:
Allisa [31]3 years ago
3 0
It’s 2 because trust me man it is
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Which of the following is not a reason for extinction?
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Answer:

the ability to breed successfully

Explanation:

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Calculate the percent composition by mass of iron in Fe(NO3)3
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Answer:

It's 23.14 percent

Explanation:

First, the mass of all the elements are:

N = 14

O = 16

Fe = 56

In this molecule you have 3 atoms of N, and 9 atoms of O, so:

3•14 = 42

16•9 = 144

The whole mass of the molecule is:

56 + 42 + 144 = 242

242/100 = 2.42, so 1% is 2.42

56/2.42 = 23.14%

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3 years ago
The experimental procedure has you wash your thermometer and dry it after you measure the temperature of naoh solution and befor
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PLEASE HELP WILL REWARD BRAINLIEST
riadik2000 [5.3K]
The answer is the principal quantum number

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Calculate the change in enthalpy for the following reaction, using the bond enthalpy data provided below. (Note: you may round t
aliina [53]

Answer:

-514 kJ/mol

Explanation:

The bond enthalpy which is also known as bond energy can be defined as the amount of energy needed to split one mole of the stated bond. The change in enthalpy of a given reaction can be estimated by subtracting the sum of the bond energies of the reactants from the sum of the bond energies of the products.

For the given chemical reaction, the change in enthalpy of the reaction is:

ΔH_{rxn} = [2(409) + 4(388) + 3(496) - 4(630) - 4(463)] kJ/mol = 818 + 1552 + 1488 - 2520 - 1852 = -514 kJ/mol

3 0
3 years ago
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