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3 years ago

The energy of motion is called

2 answers:

5 0

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy or potential energy

timama [110]3 years ago

3 0

Answer:I think it’s mechanical energy

Explanation:

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How many mL of a 1.48 M calcium hydroxide solution are needed to neutralize 36.0 mL of a 1.63 M hydrochloric acid solution

Lelechka [254]

The volume (in mL) of calcium hydroxide, Ca(OH)₂ needed for the reaction is 19.8 mL

<h3>Balanced equation </h3>

2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, HCl (nA) = 2
The mole ratio of the base, Ca(OH)₂ (nB) = 1

<h3>How to determine the volume of Ca(OH)₂ </h3>

Molarity of base, Ca(OH)₂ (Mb) = 1.48 M
Volume of acid, HCl (Va) = 36 mL
Molarity of acid, HCl (Ma) = 1.63 M
Volume of base, Ca(OH)₂ (Vb) =?

MaVa / MbVb = nA / nB

(1.63 × 36) / (1.48 × Vb) = 2

58.68 / (1.48 × Vb) = 2

Cross multiply

2 × 1.48 × Vb = 58.68

2.96 × Vb = 58.68

Divide both side by 2.96

Vb = 58.68 / 2.96

Vb = 19.8 mL

Learn more about titration:

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6 0

1 year ago

Question 5

Stolb23 [73]

Answer:

There are 17.64% students received B+ grades.

Explanation:

It is given that,

Total number of students in chemistry class is 17

We need to find the percentage received by B+.

Number of students having B+ grades are 3 (from graph)

Required percentage = $P=\dfrac{3}{17}\times 100=17.64\%$

So, there are 17.64% students received B+ grades.

8 0

3 years ago

Which of the following pairs of a greenhouse gas and its cause is not accurate?

bagirrra123 [75]

Answer: The answer would be 4. Carbon dioxide : deforestation

Explanation:

8 0

3 years ago

20 points

Rom4ik [11]

the answer is aaaaaaaaaaaaaaaaaaaaaaa

5 0

2 years ago

2) An ideal gas flows through a horizontal tube at steady state. No heat is added and no shaft work is done. The cross- sectiona

aleksandrvk [35]

Answer:

The temperature of the nitrogen gas at another section is $148.8^{o}C$

Explanation:

Energy balance equation for steady state flow of gas under negiligible potential energy.

The negligible heat transfer and no shaft work is as follows.

$\Delta H+\frac{\Delta u^{2}}{2}=Q+W$

$\Delta H+\frac{\Delta u^{2}}{2}=0..........(1)$

$\Delta H$ is enthalphy of gas and it is changes with the temperature.

$\Delta H=C_{p}(T_{2}-T_{1}).................(2)$

$C_{p}$ = Molar heat capacity of the gas at constant pressure. $T_{1}$ = Initial temperature at section 1

$T_{2}$ = Final temperature at section 2

Substitute the equation (2) in equation (1)

$C_{p}(T_{2}-T_{1})+\frac{u_{2}^2-u_{1}^2}{2}=0$

Solve the above equation is as follows.

$T_{2}=T_{1}-\frac{u_{2}^{2}-u_{1}^{2}}{2}=0...............(3)$

From the given,

$T_{1}=150+273=423K$

$C_{p}=\frac{7R}{2}$

$u_{1}=2.5\,m/s$

$u_{2}=50\,m/s$

Molar mass of nitrogen gas = 0.02802 kg/mol

Substitute the all values in the equation (3)

$T_{2}=423K-\frac{(50m/s)^{2}-(2.5m/s)^{2}}{2\times \frac{7}{2}\times8.314\,J\,mol^{-1}K^{-1}}\times \frac{J/kg}{m^{2}/s^{2}}\times \frac{0.02802\,kg}{mol}$

=421.8K=148.8^{o}C

Therefore,The temperature of the nitrogen gas at another section is $148.8^{o}C$ .

3 0

2 years ago