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Charra [1.4K]
3 years ago
10

What In the formula Na3PO4 how many moles of sodium? How many moles of phosphorus? How many moles of oxygen?

Chemistry
1 answer:
yulyashka [42]3 years ago
5 0
Sodium is Na, so there's 3 moles of that. Phosphorus is P, there's 1 mole of that. Oxygen is O, there's 4 moles of that.
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Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm.
Alona [7]

Answer: The frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm is 5.49 \times 10^{14} s^{-1}.

Explanation:

Given: Wavelength = 546 nm (1 nm = 10^{-9} m) = 546 \times 10^{-9} m

The relation between frequency and wavelength is as follows.

\nu = \frac{c}{\lambda}

where,

\nu = frequency

c = speed of light = 3.0 \times 10^{8} m/s

\lambda = wavelength

Substitute the values into above formula as follows.

\nu = \frac{c}{\lambda}\\= \frac{3.0 \times 10^{8} m/s}{546 \times 10^{-9} m}\\= 5.49 \times 10^{14} s^{-1}

Thus, we can conclude that the frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm is 5.49 \times 10^{14} s^{-1}.

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3 0
3 years ago
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How many moles of NaCl will react completely with 18.5 L F2 gas at 300.0 K and 1.00 atm?
meriva
Hello!

Data:

P (pressure) = 1 atm
V (volume) = 18.5 L
T (temperature) = 300 K
n (number of mols) = ? (in mol)
R (Gas constant) = 0.082 (atm*L/mol*K)

Apply the data to the Clapeyron equation (ideal gas equation), see:
P*V = n*R*T

1*18.5 = n*0.082*300

18.5 = 24.6n

24.6n = 18.5

n =  \dfrac{18.5}{24.6}

\boxed{\boxed{n \approx 0,752\:mol}}\end{array}}\qquad\checkmark

Note: If the feedback is to be considered, the closest response is 0.751 mol Nacl

_________________
_________________

I hope this helps. =)


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3 years ago
Which pair of elements show similarities in the pattern of chemical bonding?
tamaranim1 [39]
The answer is A, Lithium and Sodium.
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4 years ago
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