Applications of iron oxide nanoparticles include terabit magnetic storage devices, catalysis, sensors, superparamagnetic relaxometry (SPMR), and high-sensitivity biomolecular magnetic resonance imaging (MRI) for medical diagnosis and therapeutics.
Answer:
264 g/mol
Explanation:
#electrons equal #protons = 106
Plus 1 charge => m protons = 106 + 1 = 107
Mass number: 107 + 157 = 264 g/mol
the answer is twenty eight
Answer:
1. Evaporation
2. Condensation
3. Precipitation
4. Runoff
Explanation:
The water cycle shows how water moves on the earth as it passes through different phases.
Water on land is stored in oceans, rivers and other water bodies. This water coupled with those in plants and animals are turned into vapor through EVAPORATION. Evaporation facilitates the movement of water on the surface into the atmosphere.
In the atmosphere, the vapor condenses on dust particles found up there. The vapors forms a nuclei around the dust particles and water condenses at the saturated vapor pressure. This forms cloud.
As the water collects more and more, gravity forces the water to fall in form of PRECIPITATION. The precipitation can be in form of snow or rainfall.
When precipitation occurs, they move on the surface as SURFACE RUNOFFS. Some of the runoff goes back into oceans and rivers. Others infiltrates into the ground and collects in the ground water pool under the subsurface. Subsurface water can also get into into other water bodies when the water table coincides with the steam level.
The water in these bodies can then go into the cycle again. The sun is the source of energy for this process.
Answer:
The enthalphy change of the given reaction is -280 KJ.
Explanation:
X 2 + 3 Y 2 ⟶ 2 XY 3 Δ H 1 = − 380 kJ ....Eq-1
X 2 + 2 Z 2 ⟶ 2 XZ 2 Δ H 2 = − 130 kJ ....Eq-2
2 Y 2 + Z 2 ⟶ 2 Y 2 Z Δ H 3 = − 260 kJ ....Eq-3
4 XY 3 + 7 Z 2 ⟶ 6 Y 2 Z + 4 XZ 2 ΔH ....Eq-4
<em>By Hess law,</em>
<em> The heat of any reaction ΔH for a specific reaction is equal to the sum of the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction:</em>
Eq-4 can be manipulated as,
Eq-4 = -2(Eq-1) +2(Eq-2) +3(Eq-3)
By Hess law, same happen with their enthalphy
Therefore,
ΔH = -2(ΔH1) + 2(ΔH2) + 3(ΔH3)
= -2 × -380 + 2 × -130 + 3 × -260
= -280 KJ
