A scientist testing to see how a cat “always” lands on their feet drops a cat upside down out of a third story window at a heigh
1 answer:
<u>Answer: </u>
Cat has 2.02 seconds to right itself.
<u>Explanation: </u>
Initial height of cat from ground = 20 meter.
We have equation of motion , , s is the displacement, u is the initial velocity, a is the acceleration and t is the time.
In this the velocity of cat in vertical direction = 0 m/s, acceleration = acceleration due to gravity = 9.8 , we need to calculate time when s = 20 meter.
Substituting
So, cat has 2.02 seconds to right itself.
You might be interested in
The weight percentage of sodium carbonate in the mixture is = 67.71%
The weight percentage of sodium bicarbonate in the mixture is = 32.57%
<h3>What does "molar mass" ?</h3>The total mass throughout grams of all the atoms needed to form a molecule per mole is what makes up the molar mass, also known as the molecular weight. Grams per mole is the unit measuring molar mass.
<h3>According to the given information:</h3>The interaction between sodium carbonate and hydrochloric acid has the following equation:
Na₂CO₃ + HCl --> NaCl + CO₂ + H₂O
The reaction's balanced equation is,
Na₂CO₃ + 2HCl --> 2NaCl + CO₂ + H₂O -------(2).
When sodium hydrogen carbonate as well as hydrochloric acid react, the following equation results.
NaCO₃ + HCl --> NaCl + CO₂ + H₂O ----------------(3)
The Molar mass :
Na₂CO₃ = 106g/mol
NaCO₃ = 84g/mol
NaCl = 58.5g/mol
The mass of the mixture is Na₂CO₃/NaCO₃ = 9.540g
The molar masses of the constituent elements that make up the compounds are added to determine the molar weight of the substances. In both chemical equations (2) and (3), the unitary technique is employed to calculate the mass of the mixture based on the number of moles (3).
The mass of the sodium carbonate and sodium bicarbonate is calculated with the help of the mass of NaCl formed by the mixture of Na₂CO₃/NaCO₃ with HCl.
The mixture has the following percentage of sodium carbonate:
% of Na₂CO₃ =
= (6.46/9.540)*100
= 67.71%
The weight percentage of sodium carbonate in the mixture is = 67.71%
The mixture has the following percentage of NaHCO3:
% of NaHCO₃ =
=
= (3.108/9.540)*100
= 32.57%
The weight percentage of sodium bicarbonate in the mixture is = 32.57%
To know more about molar mass visit:
#SPJ4
I understand that the question you are looking for is:
A mixture of sodium carbonate and sodium hydrogen carbonate is treated with aqueous hydrochloric acid. the unbalanced equations for the resulting's reactions are:
Na2CO3 (s) + HCl (aq) --> NaCl (aq) + CO2(g) + H2O (l)
NaHCO3(s) + HCl (aq) --> NaCl (aq) + CO2(g) + H2O (l)
You treat 9.540g of Na2CO3/NaHCO3 mixture with an excess of aqueous HCl and isolate 9.355g of NaCl. What is the weight percent of each substance in the mixture?
Answer:
No, not necessarily
Explanation:
If an object is moving with an acceleration that causes its speed to be reduced, there will be a moment in which it reaches v = 0, but this doesn't necessarily mean that the acceleration isn't acting anymore. If the object continues its movement with the same acceleration, it's velocity will become negative.
An example of an object that has zero velocity but non-zero acceleration:
If you throw an object in the air with a certain velocity, it will move vertically, reducing its velocity in a 9,8 rate (which is the acceleration caused by gravity). At a certain point, the object will reach its maximum height, and will start to fall. In the exact moment that it reaches the maximum height, before it starts falling, its velocity is zero, but gravity is still acting on the object (this is the reason why it starts falling instead of just being stopped at that point). Therefore, at that point, the object has zero velocity but an acceleration of 9,8
.