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2 years ago

What is energy= energy out

2 answers:

5 0

Total energy put into the system, a closed system must equal the total energy coming off or exiting the system, in other words, total energy is and must be conserved. The difference then would be zero, as energy in = energy out.

zubka84 [21]2 years ago

4 0

I think it might mean like energy went off not sure tho

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When n = 4, l = 2, and ml = -1, to what orbital type does this refer?

Leya [2.2K]

will tell you the subshell type, so you are dealing with a d orbital.

ml will tell you the orientation of the orbital, there is no distinction between the orbitals so -1 doesnt specifically mean anything.

5 0

2 years ago

The carbon-carbon (C―C) bond has an average bond energy of 347 kJ/mol, which is the energy required to break one mole of C―C bon

olganol [36]

Answer:

(3) 345 nm

Explanation:

Given:

Average C-C bond energy = 347 kJ/mol

To determine:

Wavelength of photon that can break a C-C bond

Calculation:

The energy (E) of a photon is related to its wavelength (λ) by the Planck's equation:

$E = \frac{hc}{\lambda }$

where h = Planck's constant = 6.626*10⁻³⁴ Js

c = speed of light = 3*10⁸ m/s

$\lambda = \frac{hc}{E}$

$\lambda =\frac{6.626*10^{-34}Js*3*10^{8}ms^{-1}*6.023*10^{23}mol^{-1}}{347,000Jmol^{-1}}$

λ = 3.45*10⁻⁷ m

Since 1 nanometer (nm) = 10⁻⁹ m

The calculated wavelength corresponds to 345 nm

6 0

3 years ago

A4 g sugar cube (Sucrose : C 12 H 22 O 11 ) is dissolved in a 350 ml teacup of 80 C water. What is the percent composition by ma

lana66690 [7]

Answer:

%Sgr = 1% (1 sig.fig.)

Explanation:

mass water = 350ml x 0.975g/ml = 341.25g

mass sugar added = 4g

solution mass = 341.25g + 4g = 345.25g

%sugar = (4g/345.25g)·100% = 1.1586% ≅ 1% (1 sig.fig)

7 0

2 years ago

Lee is in customer service. How can she best support her internal customer, Dan? O al Prioritize other tasks and customers O b)

Thepotemich [5.8K]

Answer:

do i care lol LOOK AT THIS

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7 0

2 years ago

If an atom has a mass number of 25 and an atomic number of 11 how many neutrons are there in this atom?

babunello [35]

C. 14
you would subtract the mass number from the protons or the atomic number because in order to find the mass number you would add the protons and neutrons :)

5 0

3 years ago