Answers
Answer:
Explanation:
BrCl₃ is an interhalogen compound with a hybridization of sp³d. The approximate bond angles can be predicted from the structure (attached below). Although, the lewis structure might be predicted to be trigonal bipyramidal from the structure, it is however a T-shaped geometry because of it's two lone pairs.
Also, from the structure attached, it can be predicted that the approximate bond angles about the central atom is 120° (360 ÷ 3) since each of the three chlorine atoms is equally spaced about the central atom.
The Lewis structure for BrCl₃ is attached to the image below. The bond angles around the central atom, bromine (Br), are 90 degrees between the bromine and each chlorine atom. Therefore, option B is correct.
A Lewis structure, also known as an electron-dot structure or Lewis dot structure is a diagram that represents the valence electrons of an atom or molecule.
Bromine (Br) is in Group 7A and has 7 valence electrons, while each chlorine (Cl) atom in Group 7A also has 7 valence electrons.
Br: 1 atom × 7 valence electrons = 7 valence electrons
Cl: 3 atoms × 7 valence electrons = 21 valence electrons
Total valence electrons = 7 + 21 = 28
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What is the pOH of a 7.9 x 10 ^-4 M OH- solution? pOH= ?
Chem help due in 2 hours. please help. problem 14.
Ammonia is produced by the reaction of nitrogen and hydrogen: N2(g) + H2(g) NH3(g)(a) Balance the chemical equation.(b) Calculate the mass of ammonia produced when 35.0g of nitrogen reacts with hydrogen.
Answers
Answer:
-270.76°C
Explanation:
Given that metal Thallium becomes superconducting below the temperature of 2.39 kelvin i.e. this temperature is critical temperature for Thallium and below critical temperature a metal offers no resistance to the flow of electric current. Also the metal below its critical temperature expels the magnetic field in such a way that they do not penetrate the metal and pass through its surface only.
We have the relation between kelvin scale and degree Celsius scale of temperature measurement as:
Answers
Answer:
Option 3.
Explanation:
Isomerism is a phenomenon where by two or more compounds have the same molecular formula but different structural patterns.
Geometric Isomerism is a type of Isomerism that occurs within a double bond i.e Geometric isomers have different arrangement within the double bond.
Considering the options given above,
The 1st option is exactly the same as the compound only, it is inverted.
The 2nd option is still the same as the compound, only it is laterally inverted.
The 3rd option satisfy geometric Isomerism as the arrangement differ from the compound in the double bond.
The 4th option is entirely a saturated compound in which geometric Isomerism is not possible.
A) CH3CHO
B)CO2
C)CH3Cl
D)C2H6
E)NONE
Answers
There are two types of molecule in chemistry, one is polar molecule and other is non polar molecule. Therefore, among all the given option none is polar molecule. The correct option is option D.
What is polar molecule?
A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms. The term "polarity" refers to how unlike two molecules' electrical poles are from one another. If they are quite dissimilar, the species is said to be a highly polar molecule.
Dipole moment tells about the extent of polarity in a molecule. It is measured in units of Debye. It can be calculated by multiplying charge and the separation between these two charges. Among all the given option none is polar molecule.
Therefore, among all the given option none is polar molecule. The correct option is option D.
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the answer is none
Explanation:
Water
Water is the most polar molecule because a bond between oxygen and hydrogen has the most difference out of the atoms listed. Although the oxygen has two hydrogens bonded, this does not decrease the electronegativity of oxygen, but oxygen unfairly shares sets of electrons from both hydrogens, making it more polar still
Answers
Answer:
The specific heat of the copper is 0.771 cal/ grams °C
Explanation:
Step 1: Data given
Mass of the piece of copper = 15.0 grams
The temperature of the wire changes from 12.0 °C to 79.0 °C
The amount of heat absorbed is 775 cal
Step 2: Calculate the specific heat of copper
Q = m*c*ΔT
⇒with Q = the heat absorbed = 775 cal
⇒with m = the mass of the copper = 15.0 grams
⇒with c = the specific heat of copper = TO BE DETERMINED
⇒with ΔT = The change in temperature = 79.0 °C - 12.0 °C = 67.0 °C
775 cal = 15.0 grams * c * 67.0 °C
c = 0.771 cal/gm °C
The specific heat of the copper is 0.771 cal/ grams °C
Answers
Answer:
(Incomplete question)
Assuming the molarity of the weak acid is 17.4 M, the answer would be 52.4mL.
Explanation:
Equivalence point is defined as the point where moles of titrant = moles of titrand (analyte).
At equivalence point,
# moles of NaOH = # moles of weak acid
# moles of NaOH = 0.1236 × 12.43 mL
= 0.1236 mol/L × 0.01242 L
= 0.00153511 moles of NaOH
= 0.00153511 moles of weak acid.
Since the concentration of acid is not stated in your question, we will assume the concentration of the acid to be 17.4 M.
concentration = no. of moles ÷ volume
⇒ vol. = no. of moles ÷ conc.
= 0.00153511 mol ÷ 17.4 mol/L
= 0.0267 L ≈ 26.7 mL
This means that the total volume of the solution at the half equivalence point will be:
26.7 mL + 26.7 ml
= 52.4 mL.
N.B: Confirm missing variable from question: it could be concentration or volume of acid,but it is impossible to have two unknowns. Also, incase its pH of acid that's given, you can solve problem using Henderson-Hasslebauch equation.