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4 years ago

“It is important we work together on this project; we want our group to succeed.” This statement reflects __________.

Chemistry

1 answer:

Nady [450]4 years ago

5 0

Answer: Option (d) is the correct answer.

Explanation:

When people or group of people work collectively or work together in order to achieve a certain aim then it is known as collectivism.

In collectivization, people help each other.

Thus, we can conclude that it is important we work together on this project; we want our group to succeed.” This statement reflects collectivization.

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A rigid tank contains 0.66 mol of oxygen (O2). Find the mass of oxygen that must be withdrawn from the tank to lower the pressur

dsp73

Answer:

12.8 g of $O_{2}$ must be withdrawn from tank

Explanation:

Let's assume $O_{2}$ gas inside tank behaves ideally.

According to ideal gas equation- $PV=nRT$

where P is pressure of $O_{2}$ , V is volume of $O_{2}$ , n is number of moles of $O_{2}$ , R is gas constant and T is temperature in kelvin scale.

We can also write, $\frac{V}{RT}=\frac{n}{P}$

Here V, T and R are constants.

So, $\frac{n}{P}$ ratio will also be constant before and after removal of $O_{2}$ from tank

Hence, $\frac{n_{before}}{P_{before}}=\frac{n_{after}}{P_{after}}$

Here, $\frac{n_{before}}{P_{before}}=\frac{0.66mol}{43atm}$ and $P_{after}=17atm$

So, $n_{after}=\frac{n_{before}}{P_{before}}\times P_{after}=\frac{0.66mol}{43atm}\times 17atm=0.26mol$

So, moles of $O_{2}$ must be withdrawn = (0.66 - 0.26) mol = 0.40 mol

Molar mass of $O_{2}$ = 32 g/mol

So, mass of $O_{2}$ must be withdrawn = $(32\times 0.40)g=12.8g$

7 0

3 years ago

How much work is done if an object moves 4.5 m in has 12 Newtons of force on it

Cloud [144]

The formula of work is Work (Joules)=Force (Newtons) · distance in the direction of the force (meters), therefore its just a matter of replacing factors.

Work done = 12 · 4.5= 54 joules

4 0

3 years ago

How do scientists represent atoms that are bonded together?

DaniilM [7]

Answer:

When atoms join together to form molecules, they are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons between the atoms. It is only the electrons in the outermost shell that ever get involved in bonding.

7 0

3 years ago

What is 57.048 rounded to three significant figures?

AnnyKZ [126]

57.0 is it rounded to three sig figs. You count three spaces then round from there, which would be the zero and you would round down because the four is there.

4 0

4 years ago

What electron could have quantum numbers n = 2, l = 1, ml = 0, ms = +?

MrMuchimi

Answer is: electron in 2pz orbital.

The principal quantum number is one of four quantum numbers which are assigned to each electron in an atom to describe that electron's state, n=1,2,3... n=2 - the second energy level.
The azimuthal quantum number is a quantum number for an atomic orbital that determines its orbital angular momentum and describes the shape of the orbital. l = 0,1...n-1, when l = 1, that is p subshell.

The magnetic quantum number, ml, show orbital in which the electron is located, ml = -l...+l, ml = 0 is pz orbital.

The spin quantum number, ms, is the spin of the electron; ms = +1/2 or -1/2.

7 0

3 years ago