A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge? A. 313.6 meters B. 78.4 meters C. 1,254.4 meters D. 39.2 meters
Answers
v=vo + at
v=0 + (9.8)(8)
v=78.4
y=1/2(vo + v)t
y=1/2(78.4)(8)
y=1/2(627.2)
y=313.6m
The answer will be A 313.6
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b. to heat a solution
c. to decrease the surface area of a solute
d. to agitate a solution
Answers
Answer : The correct option is, (d) to agitate a solution
Explanation :
Stir bars is a type tool which is used in the chemical laboratory for mixing the solute in the solvent.
Stir bars is a magnet which is covered with such type of material that does not react with any liquid it is immersed in. Its cover is not react for any type of liquids.
The stir bar magnet is placed in a container or flask. The stir bar magnet made to spin with an external magnetic field.
The stir bar magnet is used in the laboratory to agitate a solution.
Hence, the correct option is, (d) to agitate a solution
Answers
The chemical formula for glycerol is HOCH2-CH(OH)-CH2OH while that of water is H-OH. The intermolecular forces in both water and glycerol are the strong H-bonds. However, since there are 3 OH groups/ glycerol molecule vs the one -OH group in water enables glycerol to form more H-bonds when compared to water.
The stronger attractive forces in glycerol causes an increase in its boiling point.
Answer: Glycerol has more attractive forces as compared to water.
Explanation:
Boiling point is the temperature at which vapor pressure of the liquid becomes equal to atmospheric pressure.
Boiling point depends on the strength of inter molecular forces.
The molecules of glycerol are more strongly bonded through hydrogen bonds as there are three OH groups.
But in water , only on e OH group is present and thus extent of hydrogen bonding is less.
Thus we can conclude that glycerol has more attractive forces as compared to water.
Answers
I hope that helps. Let me know in the comments if anything is unclear.
Answers
Explanation:
The anatomical structure that represents the inferior continuation of the head of the caudate nucleus is called the tail of the caudate nucleus. The tail of the caudate nucleus extends inferiorly and curves posteriorly, forming a C-shaped structure within the brain.
The tail of the caudate nucleus is a part of the basal ganglia, which is a group of subcortical structures involved in motor control, cognition, and emotion. The tail of the caudate nucleus is specifically associated with the limbic system, which is involved in emotional processing and memory.
The connections of the tail of the caudate nucleus within the brain's architecture involve both reciprocal connections within the basal ganglia and connections with other brain regions. It receives input from the cortex, particularly the prefrontal cortex, and is connected to other basal ganglia structures such as the putamen and globus pallidus.
The tail of the caudate nucleus also has connections with the hippocampus and amygdala, which are important for memory and emotional processing. These connections allow for the integration of emotional and cognitive information within the basal ganglia circuitry.
Overall, the tail of the caudate nucleus plays a role in the regulation of emotions and the integration of cognitive and emotional processes within the brain.
Hope this helps!
Final answer:
The tail of the caudate nucleus represents the inferior continuation of the head of the caudate nucleus. This part of the brain is connected with the lateral ventricles, and is involved in learning, memory, and motor processing.
Explanation:
The anatomical structure that represents the inferior continuation of the head of the caudate nucleus is the tail of the caudate nucleus. The tail of the caudate nucleus is heavily connected with the lateral ventricles, and it plays a crucial role in several functions within the brain's architecture. It is associated with various functions, including learning, memory, and motor processing. The caudate nucleus, including its tail, works with other structures in the brain to enable these complex cognitive functions.
Learn more about caudate nucleus here:
#SPJ11
Answers
Answer:
The pressure inside the wine bottle at 21 °C is 4.8 · 10² atm
Explanation:
Hi there!
We know that 1 mol of CO₂ is produced per mol of produced ethanol.
If the final concentration of ethanol is 13%, let´s calculate how many moles of ethanol are present at that concentration.
A concentration of 13% means that in 100 ml of solution, 13 ml is dissolved ethanol. We have 754 ml of solution, then, the volume of ethanol will be:
754 ml solution · (13 ml ethanol/100 ml solution) = 98 ml ethanol
With the density, we can calculate the mass of ethanol present:
density = mass/ volume
0.79 g/ml = mass / 98 ml
mass = 0.79 g/ml · 98 ml
mass = 77 g
The molar mass of ethanol is 46.07 g/mol, then 77 g of ethanol is equal to:
77 g · (1 mol/46.07 g) = 1.7 mol
Then, the number of moles of CO₂ produced will be 1.7 mol.
Using the equation of the ideal gas law, we can calculate the pressure of CO₂:
P = nRT/V
Where:
P = pressure
n = number of moles
R = ideal gas constant
T = temperature
V = volume
The volume will be the headspace of the bottle (840 ml - 754 ml) 86 ml = 0.086 l.
The temperature in kelvin will be: 21 + 273 = 294 K
The gas constant is 0.082 l atm / K mol
Then:
P = (1.7 mol · 0.082 l atm/K mol · 294 K)/ 0.086 l
P = 4.8 · 10² atm
The pressure inside the wine bottle at 21 °C is 4.8 · 10² atm
Answers
no atom in 2 g of styrene =?
molar mass of strene =104.15
% composition of c= 12/13.008 =.922*100=92.2
% composition of h =1.008/13.008=0.0774*100= 7.74
no gram atom=mass in kg /molar mass=2/104.15 =0.01920 mol
no of gram atom * avogadro's number = 0.0192*6.02 *10( exponent 23) =1.15584