Answer:
Explanation:
An old river occurs at the plain course and it is at its lower stage.
Here:
- The river gradient is very gentle as it is on a plain.
- An old river would be at its depositional phase where all the sediments its carries are being laid down.
- It has a low velocity and a very sluggish flow.
- Lateral erosion is very active at this stage.
- The volume of the river increases substantially as more river tributaries joins.
- Some of the river features are flood plains, leeves, ox-bow lakes, delta e.tc.
The difference between the initial mass (1.04 g) and the final mass (0.61g) is the mass of water present in the sample:
1.04 g - 0.61 g = 0.43 g
Divide by the molar mass of water: 18.01 g / mol to obtain the number of moles of water:
0.43 g / 18.01 g / mol = 0.0239 moles
Calculate the number of moles of dehydrated NiSO4
Number of moles = mass in grams / molar mass
molar mass of NiSO4 = 154.75 g/mol
number of moles NiSO4 = 0.61 g / 154.75 g/mol = 0.00394 moles
Now determine the molar ratio water to NiSO4: 0.0239 / 0.00394 = 6.07 ≈ 6
Then, the formula of the hydrate product is NiSO4 · 6 H2O.
Use the prefix hexa (6) to name the compound: Nickel(II) sulfate hexadydrate
The viscosity can be measured in viscosity lab indirectly by measuring the distance a liquid flowed in a given time.
Answer: Option B
<u>Explanation:</u>
Viscosity is the measure of drift velocity of any fluid. So depending upon viscosity, the thickness or the density of the fluid can be understood. A fluid with high density will be highly viscous in nature and so that fluid will be flowing slowly.
In lab, we can measure the viscosity by measuring the distance a liquid flowed in a given time. If the viscosity of fluid is high, then that fluid will be taking more time to cross the given distance. And if the fluid is having less viscosity then, the liquid will be flowed easily.
Answer:
the earth is green because the green part is the plants and tree.
1.5 × 10^-6 i would think