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3 years ago

True or false, The universal gas constant, R, is . 0821 when we use mm Hg as our unit for pressure

Chemistry

1 answer:

ludmilkaskok [199]3 years ago

5 0

Answer:

This is true.

Explanation:

R should be 0.0821

Good luck!

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Methyl red is a common acid-base indicator. it has a ka equal to 6.3 × 10–6. its un-ionized form is red and its anionic form is

Maksim231197 [3]

Hello!

The pKa of an indicator tells us the pH where it changes color. The pKa of Methyl red is

$pKa=-log(Ka)=-log( 6,3*10^{-6} )=5,20$

So, at a pH=7,8, Methyl Red would be at a pH over its pKa, so it would be in its basic form. The Basic Form of Methyl Red is Yellow, so the solution would be Yellow.

Have a nice day!

7 0

3 years ago

What are the answers to these questions

Nikitich [7]

Answer:

1. Coal (B)

Explanation:

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3 years ago

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The pressure inside a compressed gas cylinder is 144 atm at 48°C. What will the pressure inside the cylinder be after it is cool

Andrews [41]

<h3>Answer:</h3>

134 atm

<h3>Explanation:</h3>

Based on the pressure law, the pressure of a gas varies directly proportionally to the absolute temperature at a constant volume.

Therefore; we are going to use the equation;

$\frac{P1}{T1}=\frac{P2}{T2}$

In this case;

Initial pressure, P1 = 144 atm

Initial temperature, T1 (48°C) = 321 K

Final temperature, T2 (25°C) = 298 K

We need to find the final pressure,

Therefore;

P2 = (P1/T1)T2

= (144/321)× 298 K

= 133.68 atm

= 134 atm

Therefore, the new pressure will be 134 atm.

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4 years ago

Describe a procedure to separate a mixture of sugar black pepper and pebbles

andreyandreev [35.5K]

1st you pour the mixture<span> through a filter to remove the larger </span>pebbles<span>. Next, add water to dissolve the salt and then filter out the </span>pepper the last thing you do <span>evaporate the water to leave the salt behind.</span>

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3 years ago

What’s the answer?????

marin [14]

<em>potential energy</em>

<em>kinetic energy </em>

<em>kinetic energy</em>

<em>idk last sorry =( </em>

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3 years ago