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3 years ago

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7 0

Litmus paper is an indicator that changes color to identify the acidity or basicity of a certain substance. This changes color from blue to red for acids. Since given the same concentration of the compounds, the number of H⁺ in H₂SO₄ is approximately twice that of HCl.

Therefore, fewer drops of H₂SO₄ will be required in order to change the color of the litmus paper.

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sodium-24 has a half life of 15 hours. how much sodium-24 will remain in an 18.0 g sample after 60 hours

IgorLugansk [536]

Hey there!

A half-life means after a certain amount of time, half of that substance will be gone/changed after that time.

60 hours is 4 half lives because 60 ÷ 15 = 4.

So, the 18g sample will be divided in half 4 times.

18 ÷ 2 = 9

9 ÷ 2 = 4.5

4.5 ÷ 2 = 2.25

2.25 ÷ 2 = 1.125

There will he 1.125g of sodium-24 left after 60 hours.

Hope this helps!

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3 years ago

Volume, temperature, and pressure are used to measure gas . True or false?

scoray [572]

True, Hope this helps!!

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4 years ago

WHICH RIBBON WOULD BE CONSIDERED THE SENIOR RIBBON AND WOULD BE PLACED TO THE LEFT NEAR YOUR HEART?

Pie

Answer:

Explanation:

3 0

3 years ago

What evidence do you have that tpgs-750m increases the reaction rate? How does tpgs-750m act to increase the reaction rate?

notka56 [123]

TPGS-750 M conducts reaction under lower temperature then the reactions carried out in organic solvents.

It is a chemical molecule of the second generation known as an amphiphile, with both hydrophilic and lipophilic qualities.

In contrast to any other organic solvent, water is used for transition metal catalysed cross-coupling, making TPGS-750M a second generation surfactant with physical features that encourage this process.

The hydrophilic portion of TPGS-750M, which is utilised in medicine, is made of Poly(ethylene glycol), and the hydrophobic portion is made of the vitamin E compound alpha-tocopherol.

Learn more about Reaction rate here:

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#SPJ4

7 0

1 year ago

A gas at constant volume has a pressure of 4. 50 atm at 200. K. What will be the pressure of the gas at 250. K? 3. 60 atm 4. 60

Trava [24]

5.625 atm will be the pressure of the gas at 250 K temperature of the gas at constant volume.

<h3>How we calculate the pressure of the gas?</h3>

Pressure of the gas will be calculated by using the ideal gas equation as:

PV = nRT,

From the question, it is clear that:

Moles of the gas and volume is constant here, so we calculate the pressure by rearranging the above equation as:

P/T = nR/V

And required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = pressure of gas = 4.50 atm

T₁ = temperature of gas = 200 K

P₂ = pressure of gas = to find?

T₂ = temperature of gas = 250 K

On putting all these values in the above equation, we get

P₂ = 4.50 × 250 / 200 = 5.625 atm

Hence, 5.625 atm is the pressure of the gas.

To know more about ideal gas equation, visit the below link:

brainly.com/question/1056445

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3 years ago