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4 years ago

Which is a factor in determining the average atomic mass of an element

Chemistry

1 answer:

artcher [175]4 years ago

6 0

B or two relative abundance of each isotope

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1 If 5.80 L of gas is collected at a pressure of 92.0 kPa, what volume will the same gas occupy at 101.3 kPa if the temperature

Anni [7]

Answer:

The volume that the same gas will occupy at 101.3 kPa if the temperature is kept constant is 5.27 L.

Explanation:

As the volume increases, the particles (atoms or molecules) of the gas take longer to reach the walls of the container and therefore collide with them less times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law that says:

"The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P * V = k

Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:

P1 * V1 = P2 * V2

In this case, you have:

P1= 92 kPa
V1= 5.80 L
P2= 101.3 kPa
V2= ?

Replacing:

92 kPa* 5.80 L= 101.3 kPa* V2

and solving, you get:

$V2=\frac{92 kPa* 5.80 L}{101.3 kPa}$

V2= 5.27 L

The volume that the same gas will occupy at 101.3 kPa if the temperature is kept constant is 5.27 L.

4 0

3 years ago

Pls help asap !!!!!!!!!!!!

Arte-miy333 [17]

Answer:

1st option is correct.............

4 0

3 years ago

The half-life of Erbium-165 is 10.4 hours. After 24 hours a sample has been reduced to a mass of 2 mg. What was the initial mass

Pachacha [2.7K]

Answer:

$[A_0]=10\ mg$

$[A_t]=0.08245\ mg$

Explanation:

Given that:

Half life = 10.4 hours

$t_{1/2}=\frac{\ln2}{k}$

Where, k is rate constant

So,

$k=\frac{\ln2}{t_{1/2}}$

$k=\frac{\ln2}{10.4}\ hour^{-1}$

The rate constant, k = 0.06664 hour⁻¹

Time = 24 hours

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t = 2 mg

$[A_0]$ is the initial concentration = ?

So,

$2\ mg=[A_0]\times e^{-0.06664\times 24}$

$[A_0]=10\ mg$

Now, time = 3 days = 3*24 hours = 72 hours ( 1 day = 24 hours)

$[A_0]=10\ mg$

Thus,

$[A_t]=10\times e^{-0.06664\times 72}\ mg=0.08245\ mg$

6 0

4 years ago

How many different kinds of monomers are there in nucleic acids?

Oxana [17]

Kinds of monomers in nucleic acids:
There are 5 types of monomers in nucleic acids they are called nucleutides. The five pieces are uracil, cytosine, thymine, adenine, andguanine.

8 0

4 years ago

Which element is used for house cleaning

LiRa [457]

Answer:

Cleaning – every kind of cleaning – involves three elements: temperature, agitation and cleaning agent. Different jobs require different measures of each element to be successful. Let's use an example everyone knows: washing your hands

6 0

3 years ago