I believe it’s 23 as there are 23 individual atoms present in this compound.
Answer – A (Musculoskeletal injuries in healthcare
occupations are among the highest of all U.S. industries.)
<span>According to data from the Bureau of
Labor Statistics (BLS), in 2014, the rates of musculoskeletal injuries (particularly
as a result of overexertion) in healthcare occupations are among the
highest of all U.S. industries</span>.
For a neutral solution,
[H+][OH-] = 1 x 10⁻¹⁴
Mass of Calcium phosphate : = 21127.7 g
<h3>Further explanation</h3>
Given
4.1 x 10²⁵ particles of Calcium phosphate
Required
mass
Solution
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
mol Calcium phosphate :
n = N : No
n = 4.1 x 10²⁵ : 6.02 x 10²³
n = 68.11
mass Calcium phosphate Ca3(PO4)2 :
= mol x MW
= 68.11 x 310.2 g/mol
= 21127.7 g
= 21.13 kg
