612C
Explanation:
The correct answer is carbon-12: this is a nuclear fusion reaction.
In nuclear reactions, the mass number and the atomic numbers are usually conserved:
⁹₄Be + ⁴₂H ₙᵃX + ₀¹n
conserving atomic number:
4 + 2 = n + 0
n = 6
conserving mass number :
9+4 = a + 1
a = 12
therefore X = ¹²₆C
Learn more:
Transmutation brainly.com/question/3433940
#learnwithBrainly
Chromium (Cr): 2, 8, 8, 6
Copper (Cu): 2, 8, 8, 11
Chromium+2 (Cr+2): 2, 8, 8, 4 (if the ion retains a positive charge then the amount of electrons will decrease)
Copper+2 (Cu+2): 2, 8, 8, 9
Manganese+2 (Mn+2): 2, 8, 8, 5
Answer:
464.29mL de solvente y 35.71mL de ácido nítrico concentrado deben agregarse.
Explanation:
El ácido nítrico concentrado viene al 70% v/v por temas de estabilidad. El volumen de ácido nítrico que se debe agregar si se quieren hace 500mL al 5% de HNO3 es:
500mL * (5mL / 100mL) = 25mL de ácido nítrico se deben agregar.
Como el ácido nítrico está al 70%:
25mL ácido nítrico * (100mL / 70mL ácido nítrico) = 35.71mL de ácido nítrico concentrado deben agregarse.
Y el volumen de solvente debe ser:
500mL - 35.71mL = 464.29mL
The statement that is incorrect I believe would be A. The amount of matter increases slightly as water changes state.
