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3 years ago

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Chemistry

2 answers:

Aneli [31]3 years ago

5 0

Explanation:

It provides oxygen for humans to breathe..

Romashka-Z-Leto [24]3 years ago

4 0

Answer:

the answer is produces protein which humans can eat?

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How many electrons in an atom can have each of the following quantum number or sublevel designations?

lutik1710 [3]

Answer: a:6 electrons, b:10electrons, c: 2electrons

Explanation:

1.Principle quantum number(n)

n is the number of shell, it is a positive integer. The maximum number of electrons in a shell is 2(n2)

2.Azimuthal quantum number(l)

l is the number of subshell in the principal shell

The name of subshell are s, p, d, f

The number of nodes in each subshell is

s is l=0, p is l=1, d is l=2, f is l=3.

Each shell can have 2 x l + 1 sublevels, and each sublevel can accommodate maximum of 2 electrons and have two electrons.

A. n=2, l=1 then 2 x 1 + 1= 3 subshell, 3*2= 6 electrons in the p subshell

b. 3d, d is l = 2 then 2 x 2 + 1 = 5 sublevels, 5*2=10 electrons in the d subshell

c. 4s, s is l=0 then 2 x 0 + 1 = 1 sublevel, 1*2=2 electrons in the s subshell.

6 0

3 years ago

What are 6 types of energies except Potential and Kinetic energy.

aivan3 [116]

Answer:

The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.

Explanation:

Hope this helps :D

7 0

3 years ago

An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?

agasfer [191]

The mass number of the atom is 39

7 0

3 years ago

Which of these must be an organic compound? sodium chloride water carbon dioxide hydrogen peroxid?

vova2212 [387]

Hydrogen. The three most common organic compounds are hydrogen, oxygen, and nitrogen.

3 0

4 years ago

A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of ga

vivado [14]

Answer : The partial pressure of X and Y gases are, 0.525 and 1.575 atm respectively.

Explanation : Given,

Moles of X = 2.0 mole

Moles of Y = 6.0 mole

Total pressure = 2.1 atm

Now we have to calculate the mole fraction of X and Y.

$\text{Mole fraction of }X=\frac{\text{Moles of }X}{\text{Moles of }X+\text{Moles of }Y}$

$\text{Mole fraction of }X=\frac{2.0}{2.0+6.0}=0.25$

and,

$\text{Mole fraction of }Y=\frac{\text{Moles of }Y}{\text{Moles of }X+\text{Moles of }Y}$

$\text{Mole fraction of }Y=\frac{6.0}{2.0+6.0}=0.75$

Now we have to calculate the partial pressure of X and Y.

According to the Raoult's law,

$p_i=X_i\times p_T$

where,

$p_i$ = partial pressure of gas

$p_T$ = total pressure of gas = 2.1 atm

$X_i$ = mole fraction of gas

$p_{X}=X_{(X)}\times p_T$

$p_{X}=0.25\times 2.1atm=0.525atm$

and,

$p_{Y}=X_{(Y)}\times p_T$

$p_{Y}=0.75\times 2.1atm=1.575atm$

Thus, the partial pressure of X and Y gases are, 0.525 and 1.575 atm respectively.

4 0

3 years ago

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