Answer:
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Explanation:
Answer:
The Answer is B: subtract atomic mass from atomic number. I remember doing this in 8th grade!!!:)
Explanation:
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom and the atomic number.
Answer:
c
Explanation:
because of over-hunting, poaching, pollution, loss of habitat, the arrival of invasive species, and other human-caused problems
The mass ratio of zinc to iodine in zinc iodide is 0.25755. Below is the solution.
Solution:
molar mass of zinc iodide = 319.22 g/mole
zinc = 1 (atom) x 65.38 g/mole = 65.38 g/mole
iodine = 2 (atoms) x 126.92 g/mole = 253.84 g/mole
[ (65.38 g/mole) / (319.22 g/mole) ] x 100 % = 20.48 %
0.50176 g / 1.94824 g = 0.2575452716 or <span>0.25755</span>
A yeast population is affected by the number of factors, the control of which is essential for optimal activity.