If an atom has 15 protons, 14 neutrons, and 18 electrons, what is the atom's electrical charge?

1 answer:

6 0

Answer:By referring to a periodic table or table of elements, we see that phosphorus (symbol P) has an atomic number of 15. Thus, each atom has 15 protons. The mass number of the ion is 15 + 16 = 31. Because the ion has 15 protons and 18 electrons (three more electrons than protons), its net charge is 3-.

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A piece of lead loses 78.0 J ofheat and experiences a decrease in temperature of 9.0C the specific heat of lead is .130J/gC what

Ratling [72]

The mass of the piece of lead is calculated using the below formula
Q(heat)= mC delta T

Q = 78.0 j
M=mass =?
C=specific heat capacity ( 0.130 j/g/c
delat T=change in temperature = 9.0 c

by making M the subject of the formula
M = Q/ c delta T

M= 78.0 j/ 0.130 j/g/c x 9.0 c = 66.7 g of lead

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kotegsom [21]

Answer:

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3 years ago

Acid indigestion is sometimes neutralized with an antacid such as magnesium hydroxide (Mg(OH)2). What products will be released

Lunna [17]

Answer: d) $MgCl_2$ and $H_2O$ 

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

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