Answer:
Alluvial diamond mining occurs in riverbeds and beaches, where thousands of years of erosion and natural forces such as wind, rain, and water currents wash diamonds from their primary deposits in kimberlite pipes to beaches and riverbeds. Some alluvial deposits are from long-ago rivers.
The wood has undergone a chemical change and has been transfered into energy and gas. Also, the smoke coming from the fire comes from the wood
Answer:
4. Hydrogen atoms only need two electrons in their outer level to reach the noble gas structure of helium. Once again, the covalent bond holds the two atoms together because the pair of electrons is attracted to both nuclei. The hydrogen has a helium structure, and the chlorine an argon structure.
Explanation:
The osmotic pressure π, is related to concentration i.e. molarity (M) through the following equation:
π = MRT ------(1)
where R = gas constant = 0.0821 L atm/mol-K
T = temperature (let us assume 25 C = 25 + 273 = 298 K)
M = π/RT = 0.001/0.0821 * 298 = 4.09 * 10^-5 M
Now,
molarity = moles of solute/volume of solvent in Liters
= (mass of protein/molar mass)/volume
4.09 * 10^-5 moles/L = (1.0 g/molar mass)/0.1 L
Molar mass of protein = 2.445 * 10^5 g/mole
Answer:
38.4%
Explanation:
We'll begin by calculating the molar mass of Al(ClO₃)₃. This can be obtained as follow:
Molar mass of Al(ClO₃)₃
= 27 + 3[35.5 + (16×3)]
= 27 + 3[35.5 + 48]
= 27 + 3[83.5]
= 27 + 250.5
= 277.5 g/mol
Next, we shall determine the mass of Cl in Al(ClO₃)₃. This can be obtained as follow:
Mass of Cl in Al(ClO₃)₃ = 3 × Cl
= 3 × 35.5
= 106.5 g
Finally, we shall determine the percentage of Cl in Al(ClO₃)₃. This can be obtained as follow:
Mass of Cl in Al(ClO₃)₃ = 106.5 g
Mass of Al(ClO₃)₃ = 277.5 g
Percentage of Cl =?
Percentage of Cl = mass of Cl / mass of Al(ClO₃)₃ × 100
Percentage of Cl = 106.5 / 277.5 × 100
Percentage of Cl = 38.4%