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4 years ago

A gas has a pressure of 0.4 atm at 41 °C. What is the pressure at standard temperature?

Chemistry

1 answer:

dexar [7]4 years ago

5 0

Answer: 0.9 atm

Explanation:

The standard temperature and pressure (generally known as STP) is the freezing point of pure water at nominal conditions in the atmosphere (at sea level).

In this sense, the standard temperature is $273 K$ ( $0 \°C$ or $32\°F$ ) and the standard pressure is $10^{5} Pa=1 bar$ or $0.98 atm \approx 1 atm$ .

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Chemistry : the atomic number of an element is 73. Is this paramagnetic or diamagnetic? :) ...?

Finger [1]

<span>Paramagnetic, an easy way to check is to see if it is the last element within the orbital and you can do that simply by looking at the periodic table. The s orbital has two, the p has 6 so on and so forth. Some elements are considered diamagnetic if they are almost completely full. </span>

5 0

3 years ago

Read 2 more answers

13.What volume of hydrogen gas is produced when 92.4 g of sodium reacts completely according to the following reaction at 25 °C

Anastaziya [24]

Answer:

44.8L of hydrogen gas

Explanation:

The reaction expression is given as:

2Na + 2H₂O → 2NaOH + H₂

Given parameters:

Mass of sodium = 92.4g

Unknown:

Volume of hydrogen gas = ?

Solution:

To solve this problem:

1 mole of a substance at STP occupies a volume of 22.4L

Let us find the number of moles of the hydrogen gas;

Number of moles of Na = $\frac{mass}{molar mass}$

Molar mass of Na = 23g/mol

Number of moles = $\frac{92.4}{23}$ = 4.02mole

From the balanced reaction expression:

2 mole of Na will produce 1 mole of hydrogen gas

4.02 mole of Na will produce $\frac{4.02}{2}$ = 2mole of hydrogen gas

1 mole of a substance at STP occupies a volume of 22.4L

2 mole of hydrogen gas will occupy a volume of 2 x 22.4 = 44.8L of hydrogen gas

5 0

3 years ago

A sample of gas occupies a volume of 120.0 mL at a pressure of 0.75 atm and a temperature of 295 K. What will the volume be at a

MakcuM [25]

The answer to the question is 84
(Step By Step Explanation).
P1 V1/T1= P2 V2/T2
::0.75 x 120/295 = 1.25 x V2/345
90/295= 1.25V2/345
(cross multiply )
1.25V2 x 295 = 90 x 345
368.75V2 = 31050
(divide by the coefficient of the unknown) .
368.75V2/368.75 = 31050/368.75
V2 = 84.2. = 84
::The volume is 82.
Mark As brainliest

6 0

4 years ago

The volume of a gas at 99.6 kPa and 24°C is 4.23 L. What volume will it occupy at 93.3 kPa ?

yuradex [85]

The volume is increased to 4.52 L on decreasing the pressure to 93.3 kPa.

Explanation:

As per Boyle's law, the volume occupied by gas particles will be inversely proportional to the pressure experienced by those particles at constant temperature.

$V=\frac{1}{P}$

So in the present problem, the volume of gas at pressure P₁ = 99.6 kPa is given as V₁ = 4.23 L. The temperature is kept constant at 24°C. Then, if the pressure is decreased to 93.3 kPa, then the volume is tend to increase due to Boyle's law.

So let us consider the new pressure be P₂ = 93.3 kPa and the new volume has to be found.

Then using Boyle's law, $P_{1} V_{1} = P_{2} V_{2}$

Then, $V_{2}=\frac{P_{1} V_{1} }{P_{2} }$

So, $V_{2}=\frac{99.6*1000*4.23}{93.3*1000}=4.52 L$

Thus, the volume is increased to 4.52 L on decreasing the pressure to 93.3 kPa.

6 0

4 years ago

In what container can you not see the meniscus

BaLLatris [955]

Answer:

Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus. For mercury, take the measurement from the top of the meniscus. In either case, you are measuring based on the center of the meniscus.

Explanation:

7 0

3 years ago