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Drupady [299]
3 years ago
14

Describe the range of radii of most atoms in nanometers (nm)

Chemistry
1 answer:
Paraphin [41]3 years ago
3 0

The radii of most atoms fall within range of 5 × 10⁻¹¹ m to 2 × 10⁻¹⁰ m

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Why does water move into the ground to create groundwater? A. evaporation B. wind C. gravity D. friction
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The answer would be C. gravity
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In order to expand agriculture and urban areas to meet increased demand for growing populations, water supplies often have to be
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Answer:

Decrease occur in the amount and flow of water bodies.

Explanation:

There is decrease in the amount and flow of water from water bodies such as rivers and lakes etc occur when the river is diverted from large water bodies because the water flows to the diverted sides and decrease occurs in the amount of water in the rivers and lakes. Those regions from where this river passes can also be negatively affected due to low amount of water they receives for their daily needs or for cultivation of crops so we can say that this diversion has adverse effect on other populations.

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Some velomobile seats have been designed to hold ice packs inside their cushions. If you started a ride with ice packs that held
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Answer : The heat energy absorbed will be, 1.23\times 10^5cal

Solution :

The process involved in this problem are :

(1):H_2O(s)(0^oC)\rightarrow H_2O(l)(0^oC)\\\\(2):H_2O(l)(0^oC)\rightarrow H_2O(l)(32.0^oC)

The expression used will be:

\Delta H=m\times \Delta H_{fusion}+[m\times c_{p,l}\times (T_{final}-T_{initial})]

where,

m = mass of ice = 1100 g

c_{p,l} = specific heat of liquid water = 4.18J/g^oC

\Delta H_{fusion} = enthalpy change for fusion = 6.01kJ/mole=6010J/mole=\frac{6010J/mole}{18g/mole}J/g=333.89J/g

Molar mass of water = 18 g/mole

Now put all the given values in the above expression, we get:

\Delta H=1100g\times 333.89J/g+[1100g\times 4.18J/g^oC\times (32.0-0)^oC]

\Delta H=514415J=122948.1358cal=1.23\times 10^5cal

Conversion used : (1 cal = 4.184 J)

Therefore, the heat energy absorbed will be, 1.23\times 10^5cal

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A recipe calls for 1.2 cups of oil. How many liters of oil is this?
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