Alpha partical is a He nucleus. When decaying alpha particle mass is reduced by 4 and atomic number is reduced by 2.
The actual element which has 102 protons is No (Nobelium).
Since it has 167 neutrons, the mass = protons + neutrons = 102 + 167 = 269
after an alpha decay, the new element formed has 100 protons which is Fm ( Fermium)
the alpha decaying equation is,
₁₀₂²⁶⁹No → ₁₀₀²⁶⁵Fm + ₂⁴α + heat
the total mass and the atomic number( numbe rof protons) must be equal in both sides.
Using ideal gas equation, PV = nRT, and since there is no volume change and amount change, the equation is now P = kT, where k =nR/V. Temperature must be in kelvin
From the given, k = (0.82)/ (21 + 273) = 2.78 x 10^-3
Substituting T = -3.5+273, P = 0.75 atm
Acids react with metals to form hydrogen gas.
Answer:
1.64 L
Explanation:
P₁V₁ = P₂V₂
P₁ = 2.25 atm
V₁ = 0.75 L
P₂ = 1.03 atm
V₂ = ?
(2.25 atm)(0.75 L) = (1.03 atm)V₂
[(2.25 atm)(0.75 L)]/(1.03 atm) = V₂
V₂ = 1.64 L
Answer
Hi, the correct answer is,
B. It is an acid-base reaction because the sodium hydroxide base reacts with the hydrochloric acid to form a salt and water
Explanation
When an acid reacts with a base, the products are salt and water.In this case, sodium hydroxide is a base which contains hydroxide ions, OH-, whereas hydrochloric acid is an acid that has Hydrogen ions, H+.When they react, they form sodium chloride, NaCl in aqueous solution as the salt , and additional water molecules. The equation is;
NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l)
