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UkoKoshka [18]
3 years ago
11

Please help do not understand!!!!!!!!!!!!!!!

Chemistry
1 answer:
makvit [3.9K]3 years ago
7 0

Answer:

If your asking how much the reactions weigh separately than it should be 25

Explanation:

25 +25=50

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If you place 2 moles of NaCL in a beaker and then add enough water to have a final volume of 0.5 liters, what is the molarity of
julia-pushkina [17]

Answer:

The molarity of the solution is 4M

Explanation:

Molarity is defined as the amount of moles of solute present in one liter of solution. So the molarity of any solution can be found by dividing the moles of solute between the volume in liters of the solution.

For this case we have:

M=\frac{2\:moles\:NaCl}{0.5\:L\:solution} =4M

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4 years ago
According to Archimedes' principle, the mass of a floating object equals the mass of the fluid displaced by the object. A 150-lb
julsineya [31]

Answer:

The density of the swimmer is 0.0342 lbm/in3.

This value makes sense as the density of the body is very similar to the water.

Explanation:

If the swimmers is floating, the weight of the swimmer must be equal to the upward buoyant force.

We can express the weight force as the product of density and volume of the swimmer.

Then

\rho_{swimmer}*V_{swimmer}=\rho_{water}*V_{water_displaced}\\\\\rho_{swimmer}*V_{swimmer}=\rho_{water}*0.95**V_{swimmer}\\\\\rho_{swimmer}=0.95*\rho_{water}\\\\\rho_{swimmer}=0.95*0.036 lbm/in3\\\\\rho_{swimmer}=0.0342lbm/in3

It makes sense as the density of the body is very similar to the water.

5 0
3 years ago
Which of the following is true about indicators?
Darina [25.2K]

A indicator is a weak organic acid or a base which has shows different colors in acidic and basic mediums. The color change occurs when the weak acidic or basic indicator dissociates to give its respective conjugate base or conjugate acid.

Therefore the correct option would be Indicators are weak acids or bases.

7 0
4 years ago
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What prediction is most likely, based on the data?
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b

Explanation:

8 0
4 years ago
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The natural gas in a storage reservoir, under a pressure of 1.00 atmosphere, has a volume of 2.74 × 109 L at 20.0°C. The tempera
Soloha48 [4]

Answer : The final volume of gas will be, 2.36\times 10^9L

Explanation :

Charles' Law : It is defined as the volume of gas is directly proportional to the temperature of the gas at constant pressure and number of moles.

V\propto T

or,

\frac{V_1}{V_2}=\frac{T_1}{T_2}

where,

V_1 = initial volume of gas = 2.74\times 10^9L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 20.0^oC=273+20.0=293K

T_2 = final temperature of gas = -20.0^oC=273+(-20.0)=253K

Now put all the given values in the above formula, we get the final volume of the gas.

\frac{2.74\times 10^9L}{V_2}=\frac{293K}{253K}

V_2=2.36\times 10^9L

Therefore, the final volume of gas will be, 2.36\times 10^9L

8 0
3 years ago
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