A food web shows all of the possible energy pathways through an ecosystem.
The chemical name of Hc2h3o2 is Acetic Acid.
The molality of the solution is 0.0833 m
calculation
molality=mass of the solute/mass of the solvent
= 25g/300 =0.0833m
Answer:
Density,
Explanation:
Given that,
Mass of marble slab is 38.6 kg or 38600 g
The dimensions of the slab is 23 cm × 17 cm ×4 cm
We know that the density of an object is given in terms of its mass volume as follows :
So, the density of the marble slab is
Answe
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Explanation:
We use the equation:
Mass = Number of moles * Molecular or atomic mass
Since the number of moles is 1 ("one mole of carbon-12 atoms") and the atomic mass of carbon-12 atoms is 12, hence the mass would be 12 grams. Note that the unit grams (g) is used here, as it is the SI unit for mass measurement.
Number of particles in 1 mole = 6.023 × 1023
Mass of 1 electron = 9.10938 × 10-28 gm
Mass of 1 mole of electrons = 6.023 × 1023 × 9.10938 × 10-28 = 5.486 × 10 -4
Mass of 1 proton = 1.67262 × 10 -24 gm
Mass of 1 mole of protons = 6.023 × 1023 × 1.67262 × 10 -24 gm = 1.007 gm
Mass of 1 neutron = 1.67493 × 10-24 gm
Mass of 1 mole of neutron = 1.67493 × 10-24 × 6.023 × 1023 = 1.008 gm