Answer:
D
Explanation:
Divide the mass by the volume.
Answer:
The answer I believe is B. Erosion
Explanation:
Just sounds better than all the other choices.
M(H₂O) = 255 g.
m₁(NaCl) = 10.0 g.
m₁(solution) = 255 g + 10 g = 265 g.
ω₁ = 10 g / 265 g · 100%.
ω₁ = 3.77% ÷ 100% = 0.0377.
ω₂= 10% ÷ 100% = 0.1.
ω₂= m₁(NaCl) + m₂(NaCl) / m₁(solution) + m₂(NaCl).
0.1 = 10 g + m₂(NaCl) / 265 g + m₂(NaCl).
26.5 g + 0.1·m₂(NaCl) = 10 g + m₂(NaCl).
0.9·m₂(NaCl) = 16.5 g.
m₂(NaCl) = 18.33 g.
Answer:
The answer to your question is Protons = 78, Neutrons = 117, Electrons = 76
Explanation:
¹⁹⁵Pt²⁺
Protons are equal to the atomic number, Platinum has an atomic number of 78 so the number of protons = 78.
The number of neutrons = Mass number - Number of protons
= 195 - 78
= 117
The number of electrons is equal to the number of protons - two, we know this because of the 2+ exponent next to the Platinum symbol.
Number of electrons = 78 - 2
= 76
