Answer:
Міоррокоңшқкқгңоіиіиліщәөәщш3о3тігұк88yourhrh77
Answer:
1.1 percent
Explanation:
C6H5COOH⇌C6H5COO+H
Ka = [C6H5COO-][H+]/[C6H5COOH]
From pKa of 4.2, Ka = 6.3x10^-5
6.3x10^-5 = (x)(x)/0.51-x and assuming x is small...
6.3x10^-5 = x^2/0.51
x^2 = 3.213x10^-5
x =5.67 x10^-3
(5.67x10^-3/0.51)x 100 =1.1 percent
Answer:
C.because protons and electrons are equal they will be 38 so neutron will be 50
Answer:
The Equation for this reaction is as follow,
2 Cr(ClO₃)₃ → 2 CrCl₃ + 9 O₂
According to eq,
604.68 g (2mole) of Cr(ClO₃)₃ produces = 288 g (9 moles) of O₂
So,
146.5 g of Cr(ClO₃)₃ will produce = X g of O₂
Solving for X,
X = (146.5 g × 288 g) ÷ 604.68 g
X = 69.77 g of O₂
Answer:
U-238
Explanation:
For a given radioisotope, half life can be defined as the time taken for the isotope to decay into one-half of its original amount. Mathematically, this is expressed as:
where k = rate constant for the radioactive decay process
Greater the t1/2 longer will be its stability.
Based on the given data, U-238 has the largest half life and therefore will be best suited for applications mentioned.
