The number of calcium atoms that would be in a 100 g sample of calcium is 1.505 x 10²⁴ atoms
<u><em>calculation</em></u>
Step 1 ; find the moles of calcium
moles = mass÷ molar mass
from periodic table the molar mass of Ca =40 g/mol
moles is therefore = 100 g÷ 40 g/mol = 2.5 moles
Step 2: use the Avogadro's law constant to determine the number of atoms of Calcium
That is According Avogadro's law 1 mole = 6.02 × 10²³ atoms
2.5 moles=? atoms
{(2.5 moles × 6.02×10²³ atoms) / 1 mole} = 1.505 × 10²⁴ atoms
Answer:
5.88 μM is the concentration of red dye in the sample.
Explanation:
Absorbance is defined s capacity of a substance to absorb a light of a specified wavelength.It is calculated by using Beer-Lambert Law:

A = absorbance
= Molar absorptivity
c = concentration
l = Length of the solution through which light passes
Given, A = 0.468, l = d = 1.00 cm,c = ?




(
)
5.88 μM is the concentration of red dye in the sample.
B.
mass equal to that of a proton; negative charge
C. carbon
sodium is an
oxygen is o
cl is chlorine
Answer:
the earth is different in all places
Explanation: