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Kaylis [27]
3 years ago
10

293Ts- has how many protons, neutrons, and electrons

Chemistry
2 answers:
r-ruslan [8.4K]3 years ago
8 0

Answer:

Protons 78

Neutrons 117

Electrons 78

Explanation:

Afina-wow [57]3 years ago
5 0
P 78 N 117 E 78

I took honors and ap chem. Hope this helps!
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Melatonin has the chemical formula C13H16N2O2. Less than 10 milligrams(0.01g) Convert the melatonin to moles
oee [108]

Answer: There are 0.000043 moles of melatonin.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

given mass = 10 mg = 0.01 g

molar mass of C_{13}H_{16}N_2O_2 = 232.28 g

{\text {moles of melatonin}}=\frac{0.01g}{232.28g/mol}=0.000043moles

Thus there are 0.000043 moles of melatonin

6 0
3 years ago
Which statement about surface tension is FALSE?
Georgia [21]

Answer: B (Items with densities lower than water will sink due to surface tension)

Explanation:

Surface tension is an intermolecular force exerted on the surface of water making it like a stretch elastic skin. Surface tension enables items with lesser densities than water, to float and slide on a water surface. Examples insects, leaves, paper etc

According to Archimedes principle an object denser than the fluid will sink. While objects less dense than the fluid will float.

Answer is (B) is false because items with densities higher then water will sink due to surface tension

5 0
3 years ago
Which process is happening in the reaction that is shown
erastova [34]
I believe it’s B I apologize if it’s wrong
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3 years ago
Can somebody plz help answer these true or false questions correctly thanks! (Only if u for sure know them) :)
asambeis [7]

Answer:

1. False

2. True

3. False

4. True

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Explanation:

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3 years ago
in this cut-away image of an atom, where is the red arrow most likely pointed at the greatest probability of locating an electro
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Answer:

c

Explanation:

3 0
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