How does the law of conservation of mass apply to this reaction: C2H4 + O2 → H2O + CO2?
Answer:
The answer to your question is: 85.458 amu
Explanation:
data
Rubidium-85 A = 84.9118 amu abundance = 72.15%
Rubidium - 87 A = 86.9092 amu abundance = 27.85%
Atomic weight = ?
Atomic weight = 84.9118(0.7215) + 86.9092(0.2785)
Atomic weight = 61.2538 + 24.2042
Atomic weight = 85.458 amu
Cobalt-59 and Cobalt-60 differ in that they have different mass number which means they have different number of neutrons. Isotopes are atoms of the same element with similar atomic number but different mass number. Cobalt-60, has a number of uses, which includes, being used to irradiate food sources as a method of preserving food, used in industrial radiography to detect structural flaws in metal parts among other uses.
Answer:
a. 102.6g/mol
b. Rb⁺
Explanation:
a. The unknown base, XOH, <em>Where X is the alkali metal</em>, reacts with HCl thus:
XOH + HCl → H₂O + XCl
<em>Where 1 mole of the hydroxide reacts per mole of acid. </em>
Moles of HCl spent to reach the equivalence point are:
17.0mL = 0.017L ₓ (2.50mol / L) = 0.0425moles of HCl
As 1 mole of HCl reacts with 1 mole of base, moles of base are 0.0425 moles.
Molar mass of a compound is the ratio between mass in grams and moles of substance, that is:
4.36g / 0.0425mol =
<h3>102.6g/mol</h3>
b) Molar mass of OH is 17g/mol, thus, the molar mass of the alkali metal is:
102.6g/mol - 17g/mol = 85.6g/mol
The mass of Rb is 85.5g/mol, thus, the identity of the alkali metal is
<h3>Rb⁺</h3>
Breathing,Moving,Hunger,and the need to. Drink water
