Answer:
there is no change because when you remove NO it will make the reaction balance
Answer:
One may conclude that they have an identical number of electrons in their outermost shell, therefore the can be substituted for one another.
Explanation:
Elements in the same family tend to behave similarly in chemical reactions because they have similar number of valence electrons in their outermost shell and they also have similar chemical properties.
Valence electrons are responsible for reactions between elements. The valence electron makes it possible for atoms to combine and react, therefore, elements in a family behave similarly in chemical reactions because they have an identical number of electrons in their outermost shell.
Answer:
Option a (100 kPa) is the appropriate option.
Explanation:
The given value is:
Original pressure,
P₁ = 50 kPa
Let the new pressure be "x".
Now,
⇒ ![\frac{P1}{T_1} =\frac{P_2}{T_2}](https://tex.z-dn.net/?f=%5Cfrac%7BP1%7D%7BT_1%7D%20%3D%5Cfrac%7BP_2%7D%7BT_2%7D)
On substituting the values, we get
⇒ ![\frac{50}{T_1} =\frac{x}{2T_1}](https://tex.z-dn.net/?f=%5Cfrac%7B50%7D%7BT_1%7D%20%3D%5Cfrac%7Bx%7D%7B2T_1%7D)
On applying cross-multiplication, we get
⇒ ![x = 50\times 2](https://tex.z-dn.net/?f=x%20%3D%2050%5Ctimes%202)
⇒ ![=100 \ kPa](https://tex.z-dn.net/?f=%3D100%20%5C%20kPa)
Thus the answer above is the right one.
First, let's start off by finding the mass of this whole hydrate.
(Note: the unit of measurement for mass will be amu)
Let's find the molecular mass of each element.
![Co=58.933](https://tex.z-dn.net/?f=Co%3D58.933)
![Cl=35.45](https://tex.z-dn.net/?f=Cl%3D35.45)
![H=1.008](https://tex.z-dn.net/?f=H%3D1.008)
![O=15.999](https://tex.z-dn.net/?f=O%3D15.999)
Now, let's find the mass of each compound.
![CoCl_2=58.933+2(35.45)=129.833](https://tex.z-dn.net/?f=CoCl_2%3D58.933%2B2%2835.45%29%3D129.833)
![H_2O=2(1.008)+15.999=18.015](https://tex.z-dn.net/?f=H_2O%3D2%281.008%29%2B15.999%3D18.015)
We have 6 molecules of H2O, so multiply 18.015 by 6 then add that with the weight of CoCl2.
![6(18.015)=108.09](https://tex.z-dn.net/?f=6%2818.015%29%3D108.09)
![129.833+108.09=237.923](https://tex.z-dn.net/?f=129.833%2B108.09%3D237.923)
Now divide 108.09 (mass of all the H2O in the hydrate) by 237.923 (total mass of hydrate).
![\dfrac{108.09}{237.923}](https://tex.z-dn.net/?f=%5Cdfrac%7B108.09%7D%7B237.923%7D)
![\approx0.45431](https://tex.z-dn.net/?f=%5Capprox0.45431)
Turn that into a percentage and you get 45.431%.
Hope this helps! :)
Answer:
Natural selection is a process in which organisms are fit to adapt and live in the environment. Natural selection was an idea developed by Charles Darwin, Darwin contributed this idea when he was studying birds and tortoises at the Galapagos Islands. He then wrote his famous book, <em><u>O</u></em><em><u>r</u></em><em><u>i</u></em><em><u>g</u></em><em><u>i</u></em><em><u>n</u></em><em><u> </u></em><em><u>o</u></em><em><u>f</u></em><em><u> </u></em><em><u>S</u></em><em><u>p</u></em><em><u>e</u></em><em><u>c</u></em><em><u>i</u></em><em><u>e</u></em><em><u>s</u></em><em><u>.</u></em> Evolution is also very similar, evolution is a process in which organisms reproduce and mutate in order to survive and adapt. As you can see, natural selection and evolution are alike in many ways.
☆anvipatel77☆
•Expert•
Brainly Community Contributor