Which formula represents a nonpolar molecule?
(1) HCl (3) NH3
(2) H2O (4) CH4
Answers
Answer:
(4) CH4
Explanation:
When there are no polar bonds in a molecule, there is no permanent charge difference between one part of the molecule and another, and the molecule is nonpolar.
In option A, HCl is not nonpolar because Cl has a pretty high electronegativity of 3.16, the H-Cl bond is polar due to the electronegative difference. This means option A is wrong.
In option B, A water molecule is polar because (1) its O-H bonds are significantly polar, and (2) its bent geometry makes the distribution of those polar bonds asymmetrical. The side of the water molecule containing the more electronegative oxygen atom is partially negative, and the side of the molecule containing the less electronegative hydrogen atoms is partially positive.
In option C, NH3 is polar because it has 3 dipoles that do not cancel out. Each N-H bond is polar because N is more electronegative than H. NH3 is overall asymmetrical in its VSEPR shape, so the dipoles don't cancel out and it is therefore polar.
In option D, CH4 looks like a C in the middle with 4 H's coming off of it. It is nonpolar because the electronegative difference is balanced. The H's all have the same electronegativities, and all cancel out since they are opposite one another.
This is because CH4 is both symmetrical in its molecular format and also does not have any lone pairs.
Because of that, the charges on it are balanced, and if all charges are balanced, it means that the molecule is non-polar
Answer: (4) CH4
Hope this helped!! :D
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R = VP/nT
plugging in the standard values of pressure, temperature and molar volume,
R = (22.4L/mo)l(1atm)/(273.15K) = 0.0821
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Answer:
This process is considered as a cycle because it continues and dosent stops. This process includes the evaporation of watet from earth surface due to heat.this water is converted in to water vapours. After reaching clouds it condences back. When the clouds become heavy with watef it falls back on earth as rain.and the process repeats.
Explanation:
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Answer:
Explanation:
Hello there!
In this case, according to the attached solubility chart, it is possible for us to realize that about 88 grams of KNO3 are soluble at 50 °C but just 30 grams are soluble at 20 °C in the same 100 g of water.
In such a way, the crystalized mass of this solute can be calculated by subtracting the mass at 50 °C and the mass at 20 °C:
Best regards!
Answers
Answers
Final answer:
The balanced equation for the reaction between nitrogen and hydrogen to form ammonia is N₂(g) + 3H₂(g) --> 2NH3(g). This uses the concept of balanced chemical equations, which ensure the same number of atoms of each element on both sides.
Explanation:
The reactants in the question are hydrogen and nitrogen, and they react to form the product, ammonia. This reaction can be described using a balanced chemical equation, which ensures that the number of atoms of each element are the same on both the reactant and product sides of the equation.
The balanced equation for this reaction is N₂(g) + 3H₂(g) --> 2NH3(g). Here, N₂ represents nitrogen, H₂ represents hydrogen, and NH₃ represents ammonia. The 'g' in brackets indicates that these compounds are in their gaseous states. The numbers in front of the chemical formulas are called stoichiometric coefficients and they indicate the ratio in which the reactants react and the products form. In this case, one nitrogen molecule reacts with three hydrogen molecules to yield two ammonia molecules.
Chemical reactions, including this one, proceed from left to right as shown by the arrow. They show how reactants become products, similar to mathematical equations.
Learn more about Chemical Reactions here:
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Answers
Volume = 450 mL / 1000 = 0.45 L
1 mol ----------- 151.908 g
n mol ----------- 0.8 g
n = 0.8 * 1 / 151.908
n = 0.00526 moles
M = n / V
M = 0.00526 / 0.45
M = 0.01168 mol/L⁻¹
hope this helps!