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jarptica [38.1K]
3 years ago
9

Give the nuclear symbol for the isotope of phosphorus for which a=31? enter the nuclear symbol for the isotope (e.g., 42he).

Chemistry
1 answer:
Bogdan [553]3 years ago
8 0
A = number of mass = 31 => number of protons + number of neutrons = 31

Phosphours, Z = atomic number = 15 = number of protons

Symbol of the element phosphorus = P

=> The symbol of the isotope is the symbol of the element, P, with the number of mass, 31, to the left, as a superscript, and the atomic number, 15, to the left, as a suscript.
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What was The US Army trying to slove about lake Lenore in 1947
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Answer:

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Explanation:

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5 0
3 years ago
An electrochemical cell has the following standard cell notation.
icang [17]

The cell notation is:

Mg(s)|Mg^{+2}(aq)||Ag^{+}(aq)|Ag(s)

here in cell notation the left side represent the anodic half cell where right side represents the cathodic half cell

in anodic half cell : oxidation takes place [loss of electrons]

in cathodic half cell: reduction takes place [gain of electrons]

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E^{0}_{cell}=0.80-(-2.38)=+3.18V

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7 0
3 years ago
How many moles of k3po4 can be formed when 4.4 moles of h3po4 react with 3.8 moles of koh
vazorg [7]
1.27moles of K3PO4 can be formed.

7 0
3 years ago
How are elements in the last column of the periodic table similar?
maks197457 [2]
D could be the answer
7 0
3 years ago
A 98.0°C piece of cadmium (c=.850J/g°C) is placed in 150.0g of 37.0°C water. After sitting for a few minutes, both have a temper
Eduardwww [97]
The answer is 19.9 grams cadmium. 
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Since q is equal to mcΔT, we can now calculate for the mass m of the cadmium sample:
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     mcadmium = 19.9 grams
3 0
3 years ago
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