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daser333 [38]
3 years ago
13

Which term describes something that changes during an experiment?

Chemistry
2 answers:
Ahat [919]3 years ago
6 0

Answer:

Dependent variable

Explanation:

Yuki888 [10]3 years ago
3 0

Answer:

<em>A variable</em>

Explanation:

A variable is data that changes, two examples are an independent variable and a dependent variable.

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A balloon is filled with 3.50 L of water at 24.0°C. What is the volume of the water at 307 K?
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what is the volume of the water at 307 k?

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3 years ago
How many grams of Al were reacted with excess HCl if 2.34 L of hydrogen gas were collected at STP in the following reaction2Al +
Phantasy [73]

Answer:

1.87 g of Al were reacted

Explanation:

We must apply the Ideal Gases law to solve the amount of moles of H₂ produced at STP

T = 273 K

P = 1 atm

P. V = n . R . T

1 atm . 2.34 L = n . 0.082 . 273 K

( 1 atm . 2.34 L ) / ( 0.082 . 273 K) = n

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Now we can find the moles of Al with the reaction. As ratio is 3:2 we have to make a rule of three to determine the moles we used.

3 moles of H₂ came from 2 moles of Al

0.104 moles of H₂ would come from ( 0.104 . 2 ) /3 = 0.0693 moles of Al

Finally we can know the mass of Al we used ( moles . molar mass)

0.0693 mol . 26.98 g/mol = 1.87 g

3 0
3 years ago
The pH of lemon juice at 298 K is found to be 2.32. What is the concentration of e^-1. ions in the solution?
almond37 [142]
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a because as temperature increases, reaction rate increases.

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