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MakcuM [25]
3 years ago
8

Julie enters science so excited to do her lab. She sets down her book back, gets all of her safety gear on and begins to gather

her materials immediately. What is Julie doing wrong?
Chemistry
1 answer:
AleksAgata [21]3 years ago
6 0

Answer:

What Julie did wrong is that she did not read the instructions for her lab of wait for her instructor to allow her to get started.

Explanation:

it is essential to know what you are doing in a science lab because you can be injured seriously if you don't stop and take time to read and listen to you instructors directions.

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A solution with pH of 9 has [OH-] concentration of
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A sample of N2 gas in a flask is heated from 27 Celcius to 150 Celcius. If the original gas is @ pressure of 1520 torr, what is
Romashka [77]

Answer:

\large \boxed{\text{B.) 2.8 atm}}

Explanation:

The volume and amount are constant, so we can use Gay-Lussac’s Law:

At constant volume, the pressure exerted by a gas is directly proportional to its temperature.

\dfrac{p_{1}}{T_{1}} = \dfrac{p_{2}}{T_{2}}

Data:

p₁ = 1520 Torr; T₁ =   27 °C

p₂ = ?;               T₂ = 150 °C

Calculations:

(a) Convert the temperatures to kelvins

T₁ = (  27 + 273.15) K = 300.15 K

T₂ = (150 + 273.15) K = 423.15 K

(b) Calculate the new pressure

\begin{array}{rcl}\dfrac{1520}{300.15} & = & \dfrac{p_{2}}{423.15}\\\\5.064 & = & \dfrac{p_{2}}{423.15}\\\\5.064\times423.15&=&p_{2}\\p_{2} & = & \text{2143 Torr}\end{array}\\

(c) Convert the pressure to atmospheres

p = \text{2143 Torr} \times \dfrac{\text{1 atm}}{\text{760 Torr}} = \textbf{2.8 atm}\\\\\text{The new pressure reading will be $\large \boxed{\textbf{2.8 atm}}$}

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How many moles are in 175L of SO2 gas at STP
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12 moles are in the 175L of SO2 gas at STP
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