Lv 162 points

Elissa

Favourite answers0%
Answers0
Questions8
  • Rank the following acids in order of increasing equivalence point pH if titrated with NaOH.?

    1) Rank the following acids in order of increasing equivalence point pH if titrated with NaOH.

    -HBrO

    -HCl

    -HClO2

    -HCOOH

    -CH3COOH 

    2) Rank the following bases in order of increasing equivalence point pH if titrated with HCl.

    -CH3NH2

    -NaOCl

    -NH3

    -LiOH

    -NaF

    Chemistry9 months ago
  • Calculate Qsp for calcium fluoride when 100.0 mL of a 6.05×10-3 M  solution of Ca(NO3)2 is added to 270.0 mL of a 5.75×10-3 M solution of KF?

    Calculate Qsp for calcium fluoride (Ksp = 3.9 ×10–11) when 100.0 mL of a 6.05×10-3 M  solution of Ca(NO3)2 is added to 270.0 mL of a 5.75×10-3 M solution of KF.

    1 AnswerChemistry9 months ago
  • Which of the following statements correctly summarize the influence of partner A on the strength of the acid?

    Consider a binary acid, represented as HA, in which one or more ionizable H atoms are bonded to one additional element. HA is not an oxoacid. Which of the following statements correctly summarize the influence of partner A on the strength of the acid?

    a) For partner atoms in the same group, HA becomes more acidic as A increases in size.

    b) HA becomes more acidic as the number of ionizable H atoms in the structure increases.

    c) HA becomes more acidic as the partner atom A becomes more metallic.

    d) HA will always become more acidic as the electronegativity of A increases.

    e) For partner atoms in the same period, HA will become stronger as A becomes smaller.

    There can be multiple answers.

    1 AnswerChemistry9 months ago
  • Rank these species by their ability to act as an oxidant (i.e., oxidizing agent).?

    Strongest Oxidant

    Au^3+

    S

    Pb^2+

    Al^3+

    Strongest Reductant

    This is the exact order I ranked them, from highest to lowest reduction potential. But Sapling still told me I got the answer wrong.

    1 AnswerChemistry2 years ago
  • Physics: Amplitude, Displacement, Phase Angles?

    An object with mass 0.200 kg is acted on by an elastic restoring force with force constant 10.0 N/m . The object is set into oscillation with an initial potential energy of 0.130 J and an initial kinetic energy of 5.10×10−2 J .

    A) What is the amplitude of oscillation?

    B) What is the potential energy when the displacement is one-half the amplitude?

    I got this one: U = 4.53×10^−2J

    C) At what displacement are the kinetic and potential energies equal?

    D) What is the value of the phase angle ϕ if the initial velocity is positive and the initial displacement is negative?

    Physics2 years ago
  • Physics: A 180g glider on a horizontal, frictionless air track is attached to a fixed ideal spring with force constant 140N/m...?

    A 180g glider on a horizontal, frictionless air track is attached to a fixed ideal spring with force constant 140N/m . At the instant you make measurements on the glider, it is moving at 0.810m/s and is 2.50cm from its equilibrium point.

    A) Use energy conservation to find the amplitude of the motion.

    B) Use energy conservation to find the maximum speed of the glider.

    C) What is the angular frequency of the oscillations?

    1 AnswerPhysics2 years ago
  • Physics help (fluid flow, Bernoulli's principle, etc.)?

    A closed and elevated vertical cylindrical tank with diameter 2.00 m contains water to a depth of 0.900 m . A worker accidentally pokes a circular hole with diameter 0.0200 m in the bottom of the tank. As the water drains from the tank, compressed air above the water in the tank maintains a gauge pressure of 5.00×103Pa at the surface of the water. Ignore any effects of viscosity.

    a) Just after the hole is made, what is the speed of the water as it emerges from the hole?

    b) What is the ratio of this speed to the efflux speed if the top of the tank is open to the air?

    c) How much time does it take for all the water to drain from the tank?

    d) What is the ratio of this time to the time it takes for the tank to drain if the top of the tank is open to the air?

    2 AnswersPhysics2 years ago
  • Attachment image

    Physics: Rotational Motion?

    In a charming 19th-century hotel, an old-style elevator is connected to a counterweight by a cable that passes over a rotating disk 1.50 m in diameter (the figure (Figure 1)). The elevator is raised and lowered by turning the disk, and the cable does not slip on the rim of the disk but turns with it.

    A) At how many rpm must the disk turn to raise the elevator at 35.0 cm/s ?

    B) To start the elevator moving, it must be accelerated at 18g. What must be the angular acceleration of the disk, in rad/s2?

    C) Through what angle (in radians ) has the disk turned when it has raised the elevator 3.15 m between floors?

    D) Through what angle (in degrees ) has the disk turned when it has raised the elevator 3.15 m between floors?

    2 AnswersPhysics2 years ago