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Darya [45]
3 years ago
12

In 2011, a computer named Watson competed against two humans on a popular television quiz show and won. Watson listened to each

question and responded.
1. What similarities and differences are there between a computer like Watson and the human nervous system?
Chemistry
1 answer:
Molodets [167]3 years ago
6 0

Answer:

A computer is made up of wires which is like nerves in our body they send signals throughout our bodies and tell us what to do about a situation. The hard drive of a computer is just like our brain which is the main component of the nervous system it controls involuntary, voluntary, movement and coordination. Also, just like the keys and mouse of a computer we have sensory neurons which pick up what is around us by touch.

Explanation:

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The pH of a basic solution is 8.87. What is [H⁺]?
juin [17]
  • pH be x

\\ \rm\rightarrowtail -log[H^+]=8.87

\\ \rm\rightarrowtail log[H^+]=-8.87

\\ \rm\rightarrowtail [H^+]=10^{-8.87}

\\ \rm\rightarrowtail [H^+]=1.34

3 0
2 years ago
3. The molar volume of a gas at STP occupies<br> 0 1 kilopascal<br> O ooc<br> 12 grams<br> 22.4 L
Reil [10]

The molar volume of a gas at STP occupies <u>22.4 L.</u>

Option D

<u>Explanation:</u>

To find the volume of 1 mole of a gas at STP, we use the Ideal Gas Law. It is the general gas equation which gives the relation to the measurable quantities to an ideal gas as below,

P (pressure) × V (volume) = n (number of moles) × R (the gas constant) × T (temperature in Kelvin)

STP = 1 atm of pressure and 273 K for temperature

P = 1 atm

V = ?

n = 1 mole

R = 0.0821 atm L/mol K

T = 273 K

Using the equation,

\mathrm{PV}=\mathrm{nRT}

V=\frac{n R T}{P}

By substituting the above values, in the equation,

V=\frac{1 \times 0.082 \times 273}{1}=22.38\ L

V = 22.38 L

8 0
3 years ago
When heated, calcium carbonate decomposes according to the equation given below:
Margaret [11]

Answer:

Percent yield = 90.9%

Explanation:

Given data:

Mass of CaCO₃ = 50.0 g

Mass of CO₂ produced = 20.0 g

Percent yield = ?

Solution:

Chemical equation:

CaCO₃ →  CaO + CO₂

Number of moles of CaCO₃:

Number of moles = mass/molar mass

Number of moles = 50.0 g/ 100.1 g/mol

Number of moles = 0.5 mol

Now we will compare the moles of CO₂ with CaCO₃.

                      CaCO₃          :        CO₂

                          1                :           1

                       0.5               :          0.5

Mass of CO₂: Theoretical yield

Mass = number of moles × molar mass

Mass = 0.5 mol × 44 g/mol

Mass = 22 g

Percent yield:

Percent yield = ( actual yield / theoretical yield ) × 100

Percent yield = (20.0 g/ 22.0 g) × 100

Percent yield = 0.909 × 100

Percent yield = 90.9%

5 0
3 years ago
Calculate the work, w, gained or lost by the system when a gas expands from 15 L to 45 L against a constant external pressure of
marta [7]

Answer:

Work done by the system = 4545 J

Explanation:

The expression for the calculation of work done is shown below as:

w=-P\times \Delta V

Where, P is the pressure

\Delta V is the change in volume

From the question,  

\Delta V = 45 - 15 L = 30 L

P = 1.5 atm

w=-1.5\times 30\ atmL

Also, 1 atmL = 101 J

So,  

w=-1.0\times0.75\times 101\ J=-4545\ J (negative sign implies work is done by the system)

<u>Work done by the system = 4545 J</u>

6 0
3 years ago
To what pressure must a gas be compressed in order to get into a 3.00 cubic foot
Troyanec [42]

Answer:

133.3atm

Explanation:

Given parameters:

Initial volume  = 400ft³

Final volume  = 3ft³

Initial pressure = 1atm

Unknown:

Final pressure  = ?

Solution:

To solve this problem, we  apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

  Mathematically;

               P₁V₁ = P₂V₂

P and V are pressure and volume

1 and 2 are initial and final states;

   Insert parameters and solve;

                1 x 400  = P₂ x 3

                     P₂  = 133.3atm

6 0
4 years ago
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