Addition of nitric acid, HNO3, and ammonium molybdate, (NH4)2MoO4, to a solution containing aqueous sodium phosphate, Na3PO4, results in the formation of a yellow precipitate of ammonium called 12-phosphomolybdate, (NH4)3PMo12O40 and two aqueous nitrate solutions: ammonium nitrate, NH4NO3 and sodium nitrate, NaNO3. Water is also formed in this reaction. Note that 12-phosphomolybdate is a very big anion! If needed, heating in a boiling water bath can increase the rate of this reaction. You will use the formation of a yellow solid on addition of HNO3 and (NH4)2MoO4 to a sample to indicate that the phosphate ion, PO43-, is present.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally