Which is the molar mass of BF3?10.81 g/mol
29.81 g/mol
48.81 g/mol
67.81 g/mol
Answers
The molar mass of BF3 is 67.81 g/mol
Explanation
- Molar mass is the mass of all atoms in a molecule in gram per mole.
- molar mass of a molecule is calculated by adding atomic mass of constituent atom
- use the periodic table to determine the atomic mass of each element in the molecule.
that is;
atomic mass of B = 10.81 g/mol
atomic mass of F = 19 g/mol
- since there 3 atoms of F in BF3 the atomic massof F in BF3= 3 x19 = 57 g/mol
- total molar mass of BF3 = 10.81 g/mol + 57 g/mol = 67.81 g/mol
67.81 g/mol is the molar mass of BF . Therefore, the correct option is option D among all the given options.
The ratio among the mass with the quantity of substance (measured within moles) in any sample of a compound of chemicals is known as the molar mass (M) in chemistry. The molar mass of a material is a bulk attribute rather than a molecular one. The compound's molecular weight is an average over numerous samples, which frequently have different masses because of isotopes. A terrestrial average or a function of the relative proportion of the isotopes of the component atoms on Earth, the molar mass is most frequently calculated using the standard atomic weights.
atomic mass of B = 10.81 g/mol
atomic mass of F = 19 g/mol
atomic massof F in BF= 3 x19 = 57 g/mol
total molar mass of BF = 10.81 g/mol + 57 g/mol = 67.81 g/mol
Therefore, the correct option is option D.
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Final answer:
The approximate pH of a 5x10-3 MHCl solution is 3.
Explanation:
The pH of a solution can be calculated using the formula pH = -log[H+], where [H+] represents the concentration of hydrogen ions in the solution. In this case, we have an HCl solution with a concentration of 5x10-3 M. To find the pH, we need to convert the concentration into the molarity of H+ ions. Since HCl is a strong acid, it dissociates completely in water, meaning that 1 molecule of HCl yields 1 H+ ion. Therefore, the molarity of H+ ions is also 5x10-3 M. Plugging this value into the pH formula, we get:
pH = -log(5x10-3)
pH = -(-3) = 3
Therefore, the approximate pH of the 5x10-3 M HCl solution is 3.
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Answers
C + 2Cl2 ➡️ CCl4
I decided this because I believe this is the only way you could make this a balanced equation. To be a balanced equation Both sides of the equation has the same number of atoms for each element. Carbon has 1 atom and chlorine has 4.
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An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons.
For example, hydrochloric acid dissociate in aqueous solution to form hydrogen ions (H⁺) and chloride anion (Cl⁻):
HCl(aq) → H⁺(aq) + Cl⁻(aq).
An Arrhenius base is a substance that dissociates in water to form hydroxide ions (OH⁻).
For example lithium hydroxide is an Arrhenius base:
LiOH(aq) → Li⁺(aq) + OH⁻(aq).
Answer:
more H+ ions
Explanation: