Answer:
ΔG = 80,278.67 J/mol
Explanation:
Given:
∆H = - 103.85KJ/mol
∆S = - 269.74KJ/mol
T= 298 K
The Gibbs energy change (ΔG) is calculated as follows:
ΔG = ΔH - TΔS
ΔG = (-103.85KJ/mol)-298K(- 269.74KJ/mol)
ΔG = (-103.85KJ/mol) - (-80,382.52 J/mol)
ΔG = 80,278.67 J/mol
Answer: The cell wall is an outer protective membrane in many cells including plants, fungi, algae, and bacteria. Animal cells do not have a cell wall. The main functions of the cell wall are to provide structure, support, and protection for the cell. The cell wall in plants is composed mainly of cellulose and contains three layers in many plants.
Explanation:
Answer:
<u>KOH+Mg(NO3)2</u>
Explanation:
The double replacement reaction will result in:
2KOH(aq) + Mg(NO3)2
(aq)--> 2KNO3(aq) + Mg(OH)2(s)
Solubility rules prove that Mg+OH^- is insoluble and will result in a precipitate (solid)
Explanation:
Rutherford → Nucleus
Rutherford in his model of an atom proposed that in an atom positive charge is concentrated in the center of an atom with he named nucleus and along with that also told that whole of an atom is also concentrated in the nucleus of an atom.
Bohr → Electron energy levels
Bohr in his structure of atom explained that electrons revolve around the nucleus in fixed orbit or shell or energy levels.These energy levels are stable and are stationary along with different energy value.
Schrodinger → Electron cloud and orbitals
Schrodinger proposed the mechanic model of atom in which he defined the location of electrons inside an atom by electron cloud in 3-d space.To define their location he introduced concept of quantum number.
Answer:
1656.12grams
Explanation:
To calculate the mass of a substance in a particle, we need to calculate the number of moles (n).
n = nA × 6.02 × 10^23
nA = 8.98 x 10^24 particles
number of moles = 8.98 x 10^24 ÷ 6.02 × 10^23
n = 8.98/6.02 × 10^ (24 - 23)
n = 1.492 × 10^1
n = 14.92moles of CaCl2
Molar Mass of CaCl2 where Ca = 40g/mol, Cl = 35.5g/mol
CaCl2 = 40 + 35.5(2)
= 40 + 71
= 111g/mol
Using mole = mass/molar mass
mass = molar mass × mole
mass = 111 × 14.92
mass = 1656.12grams.
