Answer:
4.0406
Explanation:
Given that:
Concentration = 0.286 M
Consider the ICE take for the dissociation of acetic acid as:
HClO ⇄ H⁺ + ClO⁻
At t=0 0.286 - -
At t =equilibrium (0.286-x) x x
The expression for dissociation constant of acetic acid is:
x is very small, so (0.286 - x) ≅ 0.286
Solving for x, we get:
x = 9.1071×10⁻⁵ M
pH = -log[H⁺] = -log(9.1071×10⁻⁵) = 4.0406
2.258302785 x atoms of titanium are present in a sample containing 0.375 moles of Ti.
<h3>What are moles?</h3>
A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
To find the number atoms we need to multiply by 6.02214076 × 10^{23}.
0.375 moles x 6.02214076 ×
2.258302785 x
Hence, 2.258302785 x atoms of titanium are present in a sample containing 0.375 moles of Ti.
Learn more about moles here:
brainly.com/question/8455949
#SPJ1
Answer:
I think the answer is 4) 41
Explanation:
APE= atomic number, proton and the electrons are the same number
MAN= mass = atomic number - neutrons
121 - 80 = 41
i haven't done this in a while so hope this helps :)
To convert grams to moles, we need the molar mass of carbon. this can be founded in the periodic table.
molar mass of C= 12.0 g/mol
38.1 g C (1 mol C/ 12.0 grams)= 3.18 moles of C