CHEMISTRY COLLEGE

Identify when an object has a kinetic energy of zero joules.Question 2 options:

A. as a pendulum swings downward.

B. when the energy has been destroyed.

C. just after a ball it leaves your hand pitching a ball.

D. when an object is no longer in motion.

Answers

Answer 1

Answer:

Answer:

D I think

Explanation:

cuz 0 j means there is nothing moving

Answer 2

Answer:

Answer:

D. when an object is no longer in motion.

Explanation:

Related Questions

Exactly 1.5 g of a fuel burns under conditions of constant pressure and then again under conditions of constant volume. In measurement A the reaction produces 25.9 kJ of heat , and in measurement B the reaction produces 23.3 kJ of heat. Which measurement (A or B) corresponds to conditions of constant pressure? Which one corresponds to conditions of constant volume? Explain.
Determine total H for bonds broken and formed, the overall change in H, and the final answer with units. Is it ENDOthermic or EXOthermic? Reaction: 2H2(g) +O2(g) -> 2H2O^(g) Given: H-H 436 O+O 499 O-H 463
A range of organic molecules can undergo combustion. If pyridine
Dinitrogen monoxide has a structural formula of NNO and requires resonance structures in order to draw the Lewis structures of the molecule. Based on formal charge distributions, themostsignificant (stable) resonance structure for this molecule exhibits the order of formal charges for the 1st N, the central N, and the O atoms, respectively, as:A. 0,+1,-1B. -1,+1,0C. -2,+3,-1D. 0,0,0
The rate constant for the second-order reaction 2NOBr(g) ¡ 2NO(g) 1 Br2(g) is 0.80/M ? s at 108C. (a) Starting with a concentration of 0.086 M, calculate the concentration of NOBr after 22 s. (b) Calculate the half-lives when [NOBr]0 5 0.072 M and [NOBr]0 5 0.054 M.

If atoms contain charged particles, why do they not have a charge?

Answers

Answer:

every atom has no overall charge. because they contain equal numbers of positive protons and negative electrons. they cancel each other out making them a neutral atom.

6.579 rounded to nearest hundreth

Answers

Answer:

6.58

Explanation:

Fill in the blank.
5.22x10^-3 = [? ]x 10^-2

Answers

Answer:

?=0.522

Explanation:

5.22*10^-3=?*10^-2

5.22*0.01=?*0.1

0.522=?

This is my first time answer question, thx!

Answer:

0.522

Explanation:

Calculate the pH of the cathode compartment solution if the cell emf at 298 K is measured to be 0.660 V when (Zn^2+)=0.22 M and(P_H2)= 0.87atm.

Answers

Answer:

pH = 2.059

Explanation:

At the Cathode:

The reduction reaction is:

$2H^+ + 2e^- \to H_2 \ \ \ \mathbf{E^0_(red)= 0.00 \ V}$

At the anode:

At oxidation reaction is:

$Zn \to Zn^(2+) +2e^- \ \ \ \mathbf{E^0_(ox) = 0.76 \ V}$

The overall equation for the reaction is:

$\mathbf{Zn + 2H^+ \to Zn^(2+) + H_2}$

The overall cell potential is:

$\mathbf{E^0_(cell)= E^0_(ox) + E^0_(red)}$

$\mathbf{E^0_(cell)= 0.76 \ V +0.00 \ V}$

$\mathbf{E^0_(cell)= 0.76\ V}$

Using the formula for the Nernst equation:

$E = E^0 - ( (0.0591)/(n))log (Q)\n$

where;

E = 0.66

(Zn^2+)=0.22 M

Then

$0.66 =0.76- ( (0.0591)/(2))log \bigg ( ([Zn^(2+) ] PH_2)/([H^+]^2) \bigg )$

$0.66 =0.76- 0.02955 * log \bigg ( (0.22*0.87)/([H^+]^2) \bigg )$

3.4 = log ( 0.1914) - 2 log [H⁺]

3.4 = -0.7180 - 2 log [H⁺]

3.4 + 0.7180 = - 2 log [H⁺]

4.118 = - 2 log [H⁺]

pH = log [H⁺] = 4.118/2

pH = 2.059

The pH of the solution as described in the question is 2.7.

The equation of the reaction is;

Zn(s) + 2H^+(aq) ----> Zn^2+(aq) + H2(g)

The partial pressure of hydrogen can be converted to molarity using;

P= MRT

M = P/RT

M = 0.87atm/0.082 LatmK-1mol-1 × 298 K = 0.036 mol/L

We have to obtain the reaction quotient

Q = [Zn^2+] [H2]/[H^+]^2

Q = [0.22 ] [0.036]/[H^+]^2

Recall that, from Nernst equation;

E = E° - 0.0592/nlog Q

E° = 0.00V - (-0.76V) = 0.76V

0.660 = 0.76 - 0.0592/2logQ

0.660 - 0.76 = - 0.0592/2logQ

-0.1 = - 0.0592/2logQ

-0.1 × 2/ - 0.0592 = logQ

3.38 = log Q

Q = Antilog (3.38)

Q= 2.39 × 10^3

Now;

2.39 × 10^3 = [0.22 ] [0.036]/[H^+]^2

2.39 × 10^3 = 7.92 × 10^-3/[H^+]^2

[H^+]^2 = 7.92 × 10^-3/2.39 × 10^3

[H^+] = 1.82 × 10^-3

pH = -log[H^+]

pH = -log[ 1.82 × 10^-3]

pH = 2.7

Learn more: brainly.com/question/11897796

Help! Can someone please explain and break down the answers to both? I’m so confused!1) The moles of H2O that f am be obtained from 15.0mL of 0.250 M HCl

2) the volume of 0.150 M KMnO4 needed to replaced 1.85 mol MnCl2

Answers

Hope this helps you!!

Name the physical properties used in seperating kerosene and petrol

Answers

step by step explanation

simple distillation can be used when the temperature difference between the boiling points of two miscible liquid is at least 25°c. the temperature difference between the boiling points of kerosene and petrol is 25c. hence, this mixture can separated using simple distillation.